Revert "chore: add language parameter to routing" (#4669)

Author: chdeskur

packages/fern-docs/bundle/src/app/[host]/[domain]/[lang]/fern-docs/auth/api-key-injection/route.ts renamed to packages/fern-docs/bundle/src/app/[host]/[domain]/api/fern-docs/auth/api-key-injection/route.ts

@@ -17,19 +17,20 @@ import { notFound } from "next/navigation";
 import { type NextRequest, NextResponse } from "next/server";
 import urlJoin from "url-join";
 
-import type { BaseParams } from "@/app/types";
-
 const FORMATS = ["rss", "atom", "json"] as const;
 type Format = (typeof FORMATS)[number];
 
-export async function GET(req: NextRequest, props: { params: Promise<BaseParams> }): Promise<NextResponse> {
+export async function GET(
+    req: NextRequest,
+    props: { params: Promise<{ host: string; domain: string }> }
+): Promise<NextResponse> {
     if (isLocal()) {
         return new NextResponse("changelog is not accessible in local preview mode", {
             status: 400
         });
     }
 
-    const { host, domain, lang } = await props.params;
+    const { host, domain } = await props.params;
 
     const path = slugToHref(req.nextUrl.searchParams.get("slug") ?? req.headers.get("x-fern-changelog-slug") ?? "");
     const format = getFormat(req);