diff --git a/src/types/PickOfValue.ts b/src/types/PickOfValue.ts
deleted file mode 100644
index 95137188..00000000
--- a/src/types/PickOfValue.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export type PickOfValue<T, V> = {
-  [K in keyof T as Extract<T[K], V> extends never ? never : K]: T[K]
-}
diff --git a/src/types/ResultItem.ts b/src/types/ResultItem.ts
deleted file mode 100644
index 5b09aa91..00000000
--- a/src/types/ResultItem.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-export type ResultItem<R extends Response<unknown>> = R extends Response<
-  infer T
->
-  ? T
-  : never
-
-interface Response<T> {
-  rval?: Rval<T>
-}
-
-interface Rval<T> {
-  results?: T[]
-}