Remove obsolete context-type attribute for submissions

The value and function is no longer used.

app/assets/javascripts/editor/editor.js.erb

@@ -537,10 +537,6 @@ var CodeOceanEditor = {
         return this.isActiveFileRunnable() && this.running;
     },
 
-    isActiveFileSubmission: function () {
-        return ['Submission'].includes(this.active_frame.data('contextType'));
-    },
-
     isActiveFileTestable: function () {
         return this.isActiveFileExecutable() && ['teacher_defined_test', 'user_defined_test', 'teacher_defined_linter'].includes(this.active_frame.data('role'));
     },

app/assets/javascripts/editor/submissions.js

@@ -53,11 +53,6 @@ CodeOceanEditorSubmissions = {
   },
 
   createSubmissionCallback: function(submission){
-    // set all frames context types to submission
-    $('.frame').each(function(index, element) {
-      $(element).data('context-type', 'Submission');
-    });
-
     // update the ids of the editors and reload the annotations
     for (const editor of this.editors) {