feat: remove health check from OpenAPI spec

Summary:

Test Plan:

src/controllers/health-check/index.ts

@@ -1,27 +1,9 @@
-import { OpenAPIHono, createRoute } from "@hono/zod-openapi";
+import { Hono } from "hono";
 
-import { SuccessResponse, SuccessResponseSchema } from "~/types/schema";
+import { SuccessResponse } from "~/types/schema";
 
-const app = new OpenAPIHono();
+const app = new Hono();
 
-const route = createRoute({
-  method: "get",
-  path: "/",
-  summary: "Health check",
-  operationId: "healthCheck",
-  tags: ["aniplay"],
-  responses: {
-    200: {
-      content: {
-        "application/json": {
-          schema: SuccessResponseSchema(),
-        },
-      },
-      description: "Server is up and running!",
-    },
-  },
-});
-
-app.openapi(route, (c) => c.json(SuccessResponse, 200));
+app.get("/", (c) => c.json(SuccessResponse, 200));
 
 export default app;