refactor: remove core-trpc from main (scaffoldable via gen core-package trpc)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-trpc/src/providers/next-provider.tsx

@@ -1,32 +0,0 @@
-"use client";
-
-import { useState } from "react";
-import { QueryClientProvider } from "@tanstack/react-query";
-import { createTRPCClient, httpBatchLink } from "@trpc/client";
-import superjson from "superjson";
-import type { AppRouter } from "@repo/core-api";
-import { TRPCProvider } from "../client";
-import { getQueryClient } from "../query-client";
-
-export function NextTrpcProvider({
-  children,
-  trpcUrl = "/api/trpc",
-}: {
-  children: React.ReactNode;
-  trpcUrl?: string;
-}) {
-  const [queryClient] = useState(() => getQueryClient());
-  const [trpcClient] = useState(() =>
-    createTRPCClient<AppRouter>({
-      links: [httpBatchLink({ url: trpcUrl, transformer: superjson })],
-    }),
-  );
-
-  return (
-    <TRPCProvider trpcClient={trpcClient} queryClient={queryClient}>
-      <QueryClientProvider client={queryClient}>
-        {children}
-      </QueryClientProvider>
-    </TRPCProvider>
-  );
-}