OBS-391: Remove the LESS compiler and all associated code

.devcontainer/Dockerfile

@@ -51,7 +51,6 @@ RUN pip install --no-cache-dir --no-deps -r requirements.txt && \
 ENV PYTHONUNBUFFERED=1 \
     PYTHONDONTWRITEBYTECODE=1 \
     PYTHONPATH=/app \
-    LESS_BINARY=/webapp-frontend-deps/node_modules/.bin/lessc \
     UGLIFYJS_BINARY=/webapp-frontend-deps/node_modules/.bin/uglifyjs \
     CSSMIN_BINARY=/webapp-frontend-deps/node_modules/.bin/cssmin \
     NPM_ROOT_PATH=/webapp-frontend-deps/ \

GRAVEYARD.md

@@ -11,6 +11,10 @@ This document records interesting code that we've deleted for the sake of discov
 `bin/load_processed_crashes_into_es.py` which was used to backfill elasticsearch from crash storage
 when migrating to Google Cloud Platform.
 
+* [Removal PR](https://github.com/mozilla-services/socorro/pull/6814)
+
+`webapp/less_to_css.sh` which converts LESS files to CSS, with associated NPM script `"convert:less": "sh less_to_css.sh"`
+
 ## S3 and SQS support
 
 * [Removal PR](https://github.com/mozilla-services/socorro/pull/6669)

docker/Dockerfile

@@ -46,7 +46,6 @@ RUN pip install --no-cache-dir --no-deps -r requirements.txt && \
 ENV PYTHONUNBUFFERED=1 \
     PYTHONDONTWRITEBYTECODE=1 \
     PYTHONPATH=/app \
-    LESS_BINARY=/webapp-frontend-deps/node_modules/.bin/lessc \
     UGLIFYJS_BINARY=/webapp-frontend-deps/node_modules/.bin/uglifyjs \
     CSSMIN_BINARY=/webapp-frontend-deps/node_modules/.bin/cssmin \
     NPM_ROOT_PATH=/webapp-frontend-deps/ \

webapp/crashstats/api/static/api/css/documentation.css

@@ -1,7 +1,6 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-/* Photon Colors Less Variables v3.0.1 */
 p.url {
   margin: 15px;
   font-size: 1.6em;

webapp/crashstats/crashstats/static/crashstats/css/base.css

@@ -136,7 +136,7 @@ legend {
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-/* Photon Colors Less Variables v3.0.1 */
+ 
 /* Django forms in general */
 ul.errorlist li {
   color: var(--red);