[refactor] Remove unused omitBy function (#4886)

Co-authored-by: Claude <noreply@anthropic.com>

src/lib/litegraph/src/utils/object.ts

@@ -1,8 +0,0 @@
-export function omitBy<T extends object>(
-  obj: T,
-  predicate: (value: any) => boolean
-): Partial<T> {
-  return Object.fromEntries(
-    Object.entries(obj).filter(([_key, value]) => !predicate(value))
-  ) as Partial<T>
-}