diff --git a/tools/update-prod-static b/tools/update-prod-static
index 731569e547..f82dce8368 100755
--- a/tools/update-prod-static
+++ b/tools/update-prod-static
@@ -57,7 +57,7 @@ run(['./tools/webpack'], stdout=fp, stderr=fp)
 
 # Collect the files that we're going to serve; this creates prod-static/serve.
 run(['./manage.py', 'collectstatic', '--no-default-ignore',
-     '--noinput', '-i', 'assets', '-i', 'styles', '-i', 'templates'],
+     '--noinput', '-i', 'assets', '-i', 'js', '-i', 'styles', '-i', 'templates'],
     stdout=fp, stderr=fp)
 
 if not settings.PRODUCTION:
diff --git a/zerver/lib/storage.py b/zerver/lib/storage.py
index 64eeb32c17..160fcecfb1 100644
--- a/zerver/lib/storage.py
+++ b/zerver/lib/storage.py
@@ -1,34 +1,12 @@
 # Useful reading is https://zulip.readthedocs.io/en/latest/subsystems/front-end-build-process.html
 
 import os
-import shutil
-from typing import Any, Dict, List, Optional, Tuple
+from typing import Optional
 
 from django.conf import settings
 from django.contrib.staticfiles.storage import ManifestStaticFilesStorage
 from pipeline.storage import PipelineMixin
 
-class RemoveUnminifiedFilesMixin:
-    def post_process(self, paths: Dict[str, Tuple['ZulipStorage', str]], dry_run: bool=False,
-                     **kwargs: Any) -> List[Tuple[str, str, bool]]:
-        if dry_run:
-            return []
-
-        root = settings.STATIC_ROOT
-        to_remove = ['js']
-
-        for tree in to_remove:
-            shutil.rmtree(os.path.join(root, tree))
-
-        is_valid = lambda p: all([not p.startswith(k) for k in to_remove])
-
-        paths = {k: v for k, v in paths.items() if is_valid(k)}
-        super_class = super()
-        if hasattr(super_class, 'post_process'):
-            return super_class.post_process(paths, dry_run, **kwargs)  # type: ignore # https://github.com/python/mypy/issues/2956
-
-        return []
-
 class IgnoreBundlesManifestStaticFilesStorage(ManifestStaticFilesStorage):
     def hashed_name(self, name: str, content: Optional[str]=None, filename: Optional[str]=None) -> str:
         ext = os.path.splitext(name)[1]
@@ -75,6 +53,5 @@ if settings.PRODUCTION:
     ManifestStaticFilesStorage.path = path
 
 class ZulipStorage(PipelineMixin,
-                   RemoveUnminifiedFilesMixin,
                    IgnoreBundlesManifestStaticFilesStorage):
     pass