Clean up mypy settings

The removed excludes are covered by the first line. The Unpack feature
was enabled by default in 1.9, which is our minimum.

Author: QuLogic

pyproject.toml

@@ -223,18 +223,12 @@ enable_error_code = [
   "redundant-expr",
   "truthy-bool",
 ]
-enable_incomplete_feature = [
-  "Unpack",
-]
 exclude = [
   #stubtest
   ".*/matplotlib/(sphinxext|backends|pylab|testing/jpl_units)",
   #mypy precommit
   "galleries/",
   "doc/",
-  "lib/matplotlib/backends/",
-  "lib/matplotlib/sphinxext",
-  "lib/matplotlib/testing/jpl_units",
   "lib/mpl_toolkits/",
   #removing tests causes errors in backends
   "lib/matplotlib/tests/",