fix: remove further unused code

packages/trpc/server/document-router/schema.ts

@@ -2,19 +2,6 @@ import { z } from 'zod';
 
 import { FieldType } from '@documenso/prisma/client';
 
-export const ZSearchInboxDocumentsParamsSchema = z.object({
-  filter: z
-    .union([z.literal('SIGNED'), z.literal('NOT_SIGNED'), z.undefined()])
-    .catch(() => undefined),
-  cursor: z.number().default(1),
-  query: z
-    .string()
-    .optional()
-    .catch(() => undefined),
-});
-
-export type TSearchInboxDocumentsParamsSchema = z.infer<typeof ZSearchInboxDocumentsParamsSchema>;
-
 export const ZSetRecipientsForDocumentMutationSchema = z.object({
   documentId: z.number(),
   recipients: z.array(