Remove Custom statuses feature flag (#17075)

model/feature_flags.go

@@ -19,9 +19,6 @@ type FeatureFlags struct {
 	// Toggle on and off support for Collapsed Threads
 	CollapsedThreads bool
 
-	// Toggle on and off support for Custom User Statuses
-	CustomUserStatuses bool
-
 	// Feature flags to control plugin versions
 	PluginIncidentManagement string `plugin_id:"com.mattermost.plugin-incident-management"`
 	// Toggle on and off support for Files search
@@ -34,7 +31,6 @@ func (f *FeatureFlags) SetDefaults() {
 	f.CloudDelinquentEmailJobsEnabled = false
 	f.CollapsedThreads = false
 	f.FilesSearch = false
-	f.CustomUserStatuses = false
 	f.PluginIncidentManagement = "1.5.2"
 }