refactor: remove unused env variable (#8457)

.env.development

@@ -17,8 +17,6 @@ VITE_APP_FIREBASE_CONFIG='{"apiKey":"AIzaSyCMkxA60XIW8KbqMYL7edC4qT5l4qHX2h8","a
 # put these in your .env.local, or make sure you don't commit!
 # must be lowercase `true` when turned on
 #
-# whether to enable Service Workers in development
-VITE_APP_DEV_ENABLE_SW=
 # whether to disable live reload / HMR. Usuaully what you want to do when
 # debugging Service Workers.
 VITE_APP_DEV_DISABLE_LIVE_RELOAD=

packages/excalidraw/vite-env.d.ts

@@ -21,8 +21,6 @@ interface ImportMetaEnv {
 
   VITE_APP_FIREBASE_CONFIG: string;
 
-  // whether to enable Service Workers in development
-  VITE_APP_DEV_ENABLE_SW: string;
   // whether to disable live reload / HMR. Usuaully what you want to do when
   // debugging Service Workers.
   VITE_APP_DEV_DISABLE_LIVE_RELOAD: string;