Delete local storage patch

The main goal of this patch was to make user settings stored on disk
instead of in the browser, but this stopped working some time ago.  Not
only that but it is causing a bug where a workspace will not fully open.

A secondary goal was to fix the Vim extension but the extension appears
to work just fine without this change now (both the server and browser
versions).

This patch is not useful anymore anyway because there are remote-level
settings that *do* get stored on disk and can be used instead of
user-level settings when necessary.

Fixes #3061, and possibly #6153.

patches/series

@@ -10,7 +10,6 @@ logout.diff
 store-socket.diff
 proxy-uri.diff
 unique-db.diff
-local-storage.diff
 service-worker.diff
 sourcemaps.diff
 disable-downloads.diff