chore: remove unused file (#4576)

apps/core/.webpack/utils.ts

@@ -1,12 +0,0 @@
-import type { BuildFlags } from '@affine/cli/config';
-
-export function computeCacheKey(buildFlags: BuildFlags) {
-  return [
-    '1',
-    'node' + process.version,
-    buildFlags.mode,
-    buildFlags.distribution,
-    buildFlags.channel,
-    ...(buildFlags.localBlockSuite ? [buildFlags.localBlockSuite] : []),
-  ].join('-');
-}