build: unify build flags (#2891)

apps/web/.env.local.template

@@ -1,23 +1,5 @@
-NEXT_PUBLIC_FIREBASE_API_KEY=
-NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=
-NEXT_PUBLIC_FIREBASE_PROJECT_ID=
-NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET=
-NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID=
-NEXT_PUBLIC_FIREBASE_APP_ID=
-NEXT_PUBLIC_FIREBASE_MEASUREMENT_ID=
 # absolute path to the block suite directory
 LOCAL_BLOCK_SUITE=
-# see next.config.js
-API_SERVER_PROFILE=
-# save workspace to idb
-ENABLE_IDB_PROVIDER=1
-PREFETCH_WORKSPACE=1
-ENABLE_BC_PROVIDER=1
-EXPOSE_INTERNAL=1
-ENABLE_DEBUG_PAGE=
-ENABLE_SUBPAGE=
-ENABLE_CHANGELOG=1
-ENABLE_LEGACY_PROVIDER=true
 
 # Sentry
 SENTRY_AUTH_TOKEN=