contrib: delete squash filter (#40135)

Fixes #40087

Signed-off-by: Greg Greenway <ggreenway@apple.com>

Mirrored from https://github.com/envoyproxy/envoy @ 668642e2b8c4f5d1bfa144ce99c7583ed26ccc87

Author: update-envoy[bot]

BUILD

@@ -78,7 +78,6 @@ proto_library(
         "//contrib/envoy/extensions/filters/http/dynamo/v3:pkg",
         "//contrib/envoy/extensions/filters/http/golang/v3alpha:pkg",
         "//contrib/envoy/extensions/filters/http/language/v3alpha:pkg",
-        "//contrib/envoy/extensions/filters/http/squash/v3:pkg",
         "//contrib/envoy/extensions/filters/http/sxg/v3alpha:pkg",
         "//contrib/envoy/extensions/filters/network/client_ssl_auth/v3:pkg",
         "//contrib/envoy/extensions/filters/network/generic_proxy/codecs/kafka/v3:pkg",

contrib/envoy/extensions/filters/http/squash/v3/BUILD

@@ -16,7 +16,6 @@ proto_library(
         "//contrib/envoy/extensions/filters/http/dynamo/v3:pkg",
         "//contrib/envoy/extensions/filters/http/golang/v3alpha:pkg",
         "//contrib/envoy/extensions/filters/http/language/v3alpha:pkg",
-        "//contrib/envoy/extensions/filters/http/squash/v3:pkg",
         "//contrib/envoy/extensions/filters/http/sxg/v3alpha:pkg",
         "//contrib/envoy/extensions/filters/network/client_ssl_auth/v3:pkg",
         "//contrib/envoy/extensions/filters/network/generic_proxy/codecs/kafka/v3:pkg",