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) {
 

app/views/exercises/_editor_frame.html.slim

@@ -1,4 +1,4 @@
-div class=(defined?(own_solution) ? "own-frame" : "frame") data-executable=file.file_type.executable? data-filename=file.filepath data-renderable=file.file_type.renderable? data-role=file.role data-binary=file.file_type.binary? data-context-type=file.context_type data-read-only=file.read_only
+div class=(defined?(own_solution) ? "own-frame" : "frame") data-executable=file.file_type.executable? data-filename=file.filepath data-renderable=file.file_type.renderable? data-role=file.role data-binary=file.file_type.binary? data-read-only=file.read_only
   - if file.file_type.binary?
     - file_path = protected_upload_path(id: file.id, filename: file.filepath)
     .binary-file data-file-id=file.ancestor_id