Merge pull request #15528 from edx/mrehan/fix-noisy-ajax-captions

Dont fetch captions while fetching translations

common/lib/xmodule/xmodule/js/spec/video/video_caption_spec.js

@@ -779,7 +779,6 @@
                 Caption.fetchAvailableTranslations();
 
                 expect($.ajaxWithPrefix).toHaveBeenCalled();
-                expect(Caption.fetchCaption).toHaveBeenCalled();
                 expect(state.config.transcriptLanguages).toEqual({
                     'uk': 'Ukrainian',
                     'de': 'German'
@@ -799,7 +798,6 @@
                 Caption.fetchAvailableTranslations();
 
                 expect($.ajaxWithPrefix).toHaveBeenCalled();
-                expect(Caption.fetchCaption).not.toHaveBeenCalled();
                 expect(state.config.transcriptLanguages).toEqual({});
                 expect(Caption.renderLanguageMenu).not.toHaveBeenCalled();
             });

common/lib/xmodule/xmodule/js/src/video/09_video_caption.js

@@ -596,8 +596,8 @@
             },
 
             /**
-            * @desc Fetch the list of available translations. Upon successful receipt,
-            *    the list of available translations will be updated.
+            * @desc Fetch the list of available language codes. Upon successful receipt
+            * the list of available languages will be updated.
             *
             * @returns {jquery Promise}
             */
@@ -618,8 +618,6 @@
                         self.container.find('.langs-list').remove();
 
                         if (_.keys(newLanguages).length) {
-                            // And try again to fetch transcript.
-                            self.fetchCaption();
                             self.renderLanguageMenu(newLanguages);
                         }
                     },