Cleanup fixes (#1422)

* cleanup: remove dead code

removing some code that does nothing

* cleanup: fixing usage of deprecated gqlgen/graphql api in api/changeset_translator

* cleanup: changing to recommended comparison methods

Changing byte and case-insensitive string comparison to the recommended methods.

* cleanup: making staticcheck happy

pkg/manager/task_transcode.go

@@ -85,7 +85,6 @@ func (t *GenerateTranscodeTask) Start(wg *sizedwaitgroup.SizedWaitGroup) {
 	}
 
 	logger.Debugf("[transcode] <%s> created transcode: %s", sceneHash, outputPath)
-	return
 }
 
 // return true if transcode is needed