message: ext_authz: Remove unused FilterRequestType enum
  This removes unused FilterRequestType enum.
  Risk Level: N/A
  Testing: bazel test //test/extensions/filters/http/ext_authz/... , //test/extensions/filters/common/...
  Docs Changes: N/A
  Release Notes: N/A
diff: @@ -30,11 +30,6 @@ namespace Extensions {
  namespace HttpFilters {
  namespace ExtAuthz {
  -/**
  - * Type of requests the filter should apply to.
  - */
  -enum class FilterRequestType { Internal, External, Both };
  -
  /**
  * All stats for the Ext Authz filter. @see stats_macros.h
  */
  