fix(next): add next-env.d.ts to .gitignore (#3282)

.gitignore

@@ -10,6 +10,7 @@ lcov.info
 # next.js
 /.next/
 /out/
+/next-env.d.ts
 
 # production
 /build

next-env.d.ts

@@ -1,6 +0,0 @@
-/// <reference types="next" />
-/// <reference types="next/image-types/global" />
-import "./.next/types/routes.d.ts";
-
-// NOTE: This file should not be edited
-// see https://nextjs.org/docs/pages/api-reference/config/typescript for more information.