Merge pull request #11325 from edx/ormsbee/remove_old_sass

Remove unused scss files.

lms/static/sass/application-rtl.scss

-/*
- * This file is dynamically generated and ignored by Git.
- * DO NOT MAKE CHANGES HERE. Instead, go edit its template:
- * /edx/app/edxapp/edx-platform/lms/static/sass/application-rtl.scss.mako
- */
-// lms - css application architecture
-// ====================
-
-// libs and resets *do not edit*
-@import 'bourbon/bourbon'; // lib - bourbon
-@import 'vendor/bi-app/bi-app-rtl'; // set the layout for right to left languages
-
-// BASE  *default edX offerings*
-// ====================
-
-// base - utilities
-@import 'base/reset';
-@import 'base/variables';
-@import 'base/mixins';
-
-
-@import 'build-lms'; // shared app style assets/rendering
-

lms/static/sass/application.scss

-/*
- * This file is dynamically generated and ignored by Git.
- * DO NOT MAKE CHANGES HERE. Instead, go edit its template:
- * /edx/app/edxapp/edx-platform/lms/static/sass/application.scss.mako
- */
-// lms - css application architecture
-// ====================
-
-// libs and resets *do not edit*
-@import 'bourbon/bourbon'; // lib - bourbon
-@import 'vendor/bi-app/bi-app-ltr'; // set the layout for left to right languages
-
-// BASE  *default edX offerings*
-// ====================
-
-// base - utilities
-@import 'base/reset';
-@import 'base/variables';
-@import 'base/mixins';
-
-
-@import 'build-lms'; // shared app style assets/rendering

lms/static/sass/course-rtl.scss

-/*
- * This file is dynamically generated and ignored by Git.
- * DO NOT MAKE CHANGES HERE. Instead, go edit its template:
- * /edx/app/edxapp/edx-platform/lms/static/sass/course-rtl.scss.mako
- */
-@import 'bourbon/bourbon';
-@import 'vendor/bi-app/bi-app-rtl'; // set the layout for right to left languages
-
-@import 'base/reset';
-@import 'base/variables';
-@import 'base/font_face';
-@import 'base/mixins';
-
-
-@import 'build-course'; // shared app style assets/rendering

lms/static/sass/course.scss

-/*
- * This file is dynamically generated and ignored by Git.
- * DO NOT MAKE CHANGES HERE. Instead, go edit its template:
- * /edx/app/edxapp/edx-platform/lms/static/sass/course.scss.mako
- */
-@import 'bourbon/bourbon';
-@import 'vendor/bi-app/bi-app-ltr'; // set the layout for left to right languages
-
-@import 'base/reset';
-@import 'base/variables';
-@import 'base/font_face';
-@import 'base/mixins';
-
-
-@import 'build-course'; // shared app style assets/rendering