remove unused code around unimplemented ExperimentalSettings.EnableClickToReply setting (#20389)

model/config.go

@@ -942,7 +942,6 @@ func (s *MetricsSettings) SetDefaults() {
 type ExperimentalSettings struct {
 	ClientSideCertEnable            *bool   `access:"experimental_features,cloud_restrictable"`
 	ClientSideCertCheck             *string `access:"experimental_features,cloud_restrictable"`
-	EnableClickToReply              *bool   `access:"experimental_features,write_restrictable,cloud_restrictable"`
 	LinkMetadataTimeoutMilliseconds *int64  `access:"experimental_features,write_restrictable,cloud_restrictable"`
 	RestrictSystemAdmin             *bool   `access:"experimental_features,write_restrictable"`
 	UseNewSAMLLibrary               *bool   `access:"experimental_features,cloud_restrictable"`
@@ -961,10 +960,6 @@ func (s *ExperimentalSettings) SetDefaults() {
 		s.ClientSideCertCheck = NewString(ClientSideCertCheckSecondaryAuth)
 	}
 
-	if s.EnableClickToReply == nil {
-		s.EnableClickToReply = NewBool(false)
-	}
-
 	if s.LinkMetadataTimeoutMilliseconds == nil {
 		s.LinkMetadataTimeoutMilliseconds = NewInt64(ExperimentalSettingsDefaultLinkMetadataTimeoutMilliseconds)
 	}