Remove Global Drafts Feature Flag (#23767)

* Remove global draft feature flag

* More removal - in progress

* Removed the rest in webapp

* Removed the rest in webapp

* Fix tests

* Update feature_flags.go

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/app/draft.go

@@ -16,7 +16,7 @@ import (
 )
 
 func (a *App) GetDraft(userID, channelID, rootID string) (*model.Draft, *model.AppError) {
-	if !a.Config().FeatureFlags.GlobalDrafts || !*a.Config().ServiceSettings.AllowSyncedDrafts {
+	if !*a.Config().ServiceSettings.AllowSyncedDrafts {
 		return nil, model.NewAppError("GetDraft", "app.draft.feature_disabled", nil, "", http.StatusNotImplemented)
 	}
 
@@ -35,7 +35,7 @@ func (a *App) GetDraft(userID, channelID, rootID string) (*model.Draft, *model.A
 }
 
 func (a *App) UpsertDraft(c *request.Context, draft *model.Draft, connectionID string) (*model.Draft, *model.AppError) {
-	if !a.Config().FeatureFlags.GlobalDrafts || !*a.Config().ServiceSettings.AllowSyncedDrafts {
+	if !*a.Config().ServiceSettings.AllowSyncedDrafts {
 		return nil, model.NewAppError("CreateDraft", "app.draft.feature_disabled", nil, "", http.StatusNotImplemented)
 	}
 
@@ -75,7 +75,7 @@ func (a *App) UpsertDraft(c *request.Context, draft *model.Draft, connectionID s
 }
 
 func (a *App) GetDraftsForUser(userID, teamID string) ([]*model.Draft, *model.AppError) {
-	if !a.Config().FeatureFlags.GlobalDrafts || !*a.Config().ServiceSettings.AllowSyncedDrafts {
+	if !*a.Config().ServiceSettings.AllowSyncedDrafts {
 		return nil, model.NewAppError("GetDraftsForUser", "app.draft.feature_disabled", nil, "", http.StatusNotImplemented)
 	}
 
@@ -118,7 +118,7 @@ func (a *App) getFileInfosForDraft(draft *model.Draft) ([]*model.FileInfo, *mode
 }
 
 func (a *App) DeleteDraft(userID, channelID, rootID, connectionID string) (*model.Draft, *model.AppError) {
-	if !a.Config().FeatureFlags.GlobalDrafts || !*a.Config().ServiceSettings.AllowSyncedDrafts {
+	if !*a.Config().ServiceSettings.AllowSyncedDrafts {
 		return nil, model.NewAppError("DeleteDraft", "app.draft.feature_disabled", nil, "", http.StatusNotImplemented)
 	}