fix: remove toggleGrid shortcut

tldraw/packages/core/src/lib/TLApp/TLApp.ts

@@ -93,10 +93,6 @@ export class TLApp<
       return
     }
     const ownShortcuts: TLShortcut<S, K>[] = [
-      {
-        keys: 'mod+shift+g',
-        fn: () => this.api.toggleGrid(),
-      },
       {
         keys: 'shift+0',
         fn: () => this.api.resetZoom(),