refactor: remove unused m2 mixins (#31166)

Co-authored-by: Andrew Seguin <andrewseguin@google.com>

Author: andrewseguin

src/material/autocomplete/_m2-autocomplete.scss

@@ -1,7 +1,5 @@
-@use '../core/tokens/m2-utils';
 @use '../core/theming/inspection';
 @use '../core/style/elevation';
-@use '../core/style/sass-utils';
 
 // Tokens that can't be configured through Angular Material's current theming API,
 // but may be in a future version of the theming API.
@@ -28,14 +26,3 @@
 @function get-density-tokens($theme) {
   @return ();
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-      get-unthemable-tokens(),
-      get-color-tokens(m2-utils.$placeholder-color-config),
-      get-typography-tokens(m2-utils.$placeholder-typography-config),
-      get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}

src/material/badge/_m2-badge.scss

@@ -2,9 +2,7 @@
 @use 'sass:map';
 @use 'sass:math';
 @use 'sass:color';
-@use '../core/tokens/m2-utils';
 @use '../core/theming/inspection';
-@use '../core/style/sass-utils';
 
 $_default-size: 22px;
 $_small-size: $_default-size - 6px;
@@ -94,14 +92,3 @@ $_large-size: $_default-size + 6px;
 @function get-density-tokens($theme) {
   @return ();
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-      get-unthemable-tokens(),
-      get-color-tokens(m2-utils.$placeholder-color-config),
-      get-typography-tokens(m2-utils.$placeholder-typography-config),
-      get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}

src/material/bottom-sheet/_m2-bottom-sheet.scss

@@ -1,6 +1,4 @@
-@use '../core/tokens/m2-utils';
 @use '../core/theming/inspection';
-@use '../core/style/sass-utils';
 
 // Tokens that can't be configured through Angular Material's current theming API,
 // but may be in a future version of the theming API.
@@ -37,14 +35,3 @@
 @function get-density-tokens($theme) {
   @return ();
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-      get-unthemable-tokens(),
-      get-color-tokens(m2-utils.$placeholder-color-config),
-      get-typography-tokens(m2-utils.$placeholder-typography-config),
-      get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}

src/material/button-toggle/_m2-button-toggle.scss

@@ -1,6 +1,5 @@
 @use 'sass:map';
 @use 'sass:meta';
-@use '../core/tokens/m2-utils';
 @use '../core/theming/theming';
 @use '../core/theming/inspection';
 @use '../core/style/sass-utils';
@@ -103,14 +102,3 @@
     button-toggle-height: map.get($size-scale, $density-scale)
   );
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-      get-unthemable-tokens(),
-      get-color-tokens(m2-utils.$placeholder-color-config),
-      get-typography-tokens(m2-utils.$placeholder-typography-config),
-      get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}

src/material/button/_m2-button.scss

@@ -3,7 +3,6 @@
 @use '../core/tokens/m2-utils';
 @use '../core/theming/theming';
 @use '../core/theming/inspection';
-@use '../core/style/sass-utils';
 @use '../core/style/elevation';
 
 // Tokens that can't be configured through Angular Material's current theming API,
@@ -238,14 +237,3 @@
     button-tonal-touch-target-display: $touch-target-display,
   );
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-      get-unthemable-tokens(),
-      get-color-tokens(m2-utils.$placeholder-color-config),
-      get-typography-tokens(m2-utils.$placeholder-typography-config),
-      get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}

src/material/button/_m2-fab.scss

@@ -2,7 +2,6 @@
 @use '../core/tokens/m2-utils';
 @use '../core/theming/theming';
 @use '../core/theming/inspection';
-@use '../core/style/sass-utils';
 @use '../core/style/elevation';
 
 // Tokens that can't be configured through Angular Material's current theming API,
@@ -117,14 +116,3 @@
     fab-touch-target-display: if($density-scale < -1, none, block),
   );
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-      get-unthemable-tokens(),
-      get-color-tokens(m2-utils.$placeholder-color-config),
-      get-typography-tokens(m2-utils.$placeholder-typography-config),
-      get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}

src/material/button/_m2-icon-button.scss

@@ -1,9 +1,7 @@
 @use 'sass:meta';
 @use 'sass:map';
-@use '../core/tokens/m2-utils';
 @use '../core/theming/theming';
 @use '../core/theming/inspection';
-@use '../core/style/sass-utils';
 
 // Tokens that can't be configured through Angular Material's current theming API,
 // but may be in a future version of the theming API.
@@ -71,14 +69,3 @@
 
   @return $tokens;
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-      get-unthemable-tokens(),
-      get-color-tokens(m2-utils.$placeholder-color-config),
-      get-typography-tokens(m2-utils.$placeholder-typography-config),
-      get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}

src/material/card/_m2-card.scss

@@ -1,6 +1,4 @@
-@use '../core/tokens/m2-utils';
 @use '../core/theming/inspection';
-@use '../core/style/sass-utils';
 @use '../core/style/elevation';
 
 // Tokens that can't be configured through Angular Material's current theming API,
@@ -50,14 +48,3 @@
 @function get-density-tokens($theme) {
   @return ();
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-      get-unthemable-tokens(),
-      get-color-tokens(m2-utils.$placeholder-color-config),
-      get-typography-tokens(m2-utils.$placeholder-typography-config),
-      get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}

src/material/checkbox/_m2-checkbox.scss

@@ -98,14 +98,3 @@
     ), $scale)
   );
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-    get-unthemable-tokens(),
-    get-color-tokens(m2-utils.$placeholder-color-config),
-    get-typography-tokens(m2-utils.$placeholder-typography-config),
-    get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}

src/material/chips/_m2-chip.scss

@@ -1,9 +1,7 @@
 @use 'sass:map';
 @use 'sass:meta';
 @use 'sass:color';
-@use '../core/tokens/m2-utils';
 @use '../core/theming/inspection';
-@use '../core/style/sass-utils';
 @use '../core/m2/palette' as m2-palette;
 @use '../core/theming/theming';
 
@@ -110,14 +108,3 @@
     )
   );
 }
-
-// Combines the tokens generated by the above functions into a single map with placeholder values.
-// This is used to create token slots.
-@function get-token-slots() {
-  @return sass-utils.deep-merge-all(
-      get-unthemable-tokens(),
-      get-color-tokens(m2-utils.$placeholder-color-config),
-      get-typography-tokens(m2-utils.$placeholder-typography-config),
-      get-density-tokens(m2-utils.$placeholder-density-config)
-  );
-}