MM-16228 Remove DisablePostMetadata setting (#11138)

* MM-16228 Remove DisablePostMetadata setting

* Remove DEPRECATED_DO_NOT_USE_DisablePostMetadata

model/config.go

@@ -756,7 +756,6 @@ func (s *MetricsSettings) SetDefaults() {
 type ExperimentalSettings struct {
 	ClientSideCertEnable            *bool
 	ClientSideCertCheck             *string
-	DisablePostMetadata             *bool  `restricted:"true"`
 	EnableClickToReply              *bool  `restricted:"true"`
 	LinkMetadataTimeoutMilliseconds *int64 `restricted:"true"`
 	RestrictSystemAdmin             *bool  `restricted:"true"`
@@ -771,10 +770,6 @@ func (s *ExperimentalSettings) SetDefaults() {
 		s.ClientSideCertCheck = NewString(CLIENT_SIDE_CERT_CHECK_SECONDARY_AUTH)
 	}
 
-	if s.DisablePostMetadata == nil {
-		s.DisablePostMetadata = NewBool(false)
-	}
-
 	if s.EnableClickToReply == nil {
 		s.EnableClickToReply = NewBool(false)
 	}