maint(Bundle): Remove unused prismljs and google-code-prettify modules.

Author: thet

package.json

@@ -14,7 +14,6 @@
         "@fullcalendar/timegrid": "^5.11.3",
         "@stomp/stompjs": "^6.1.2",
         "dompurify": "^2.4.1",
-        "google-code-prettify": "^1.0.5",
         "highlight.js": "<11",
         "imagesloaded": "^4.1.4",
         "jquery": "^3.6.1",
@@ -27,7 +26,6 @@
         "photoswipe": "^4.1.3",
         "pikaday": "^1.8.0",
         "prettier": "^2.7.1",
-        "prismjs": "^1.29.0",
         "screenfull": "^6.0.2",
         "select2": "^3.5.1",
         "showdown": "^2.1.0",