fix: resolve conflict

Author: mattchannn

packages/toolkit/src/query/core/buildMiddleware/cacheCollection.ts

@@ -11,16 +11,6 @@ import type {
 
 export type ReferenceCacheCollection = never
 
-function isObjectEmpty(obj: Record<any, any>) {
-  // Apparently a for..in loop is faster than `Object.keys()` here:
-  // https://stackoverflow.com/a/59787784/62937
-  for (const k in obj) {
-    // If there is at least one key, it's not empty
-    return false
-  }
-  return true
-}
-
 /**
  * @example
    * ```ts