Revert "modified: src/env.js"

This reverts commit 571a64d1d5.

src/env.js

@@ -19,7 +19,6 @@ export const env = createEnv({
     NODE_ENV: z
       .enum(["development", "test", "production"])
       .default("development"),
-    URL: z.string().url().optional(),
   },
 
   /**
@@ -41,7 +40,6 @@ export const env = createEnv({
     AUTH_DISCORD_SECRET: process.env.AUTH_DISCORD_SECRET,
     DATABASE_URL: process.env.DATABASE_URL,
     NODE_ENV: process.env.NODE_ENV,
-    URL: process.env.NEXT_PUBLIC_URL,
   },
   /**
    * Run `build` or `dev` with `SKIP_ENV_VALIDATION` to skip env validation. This is especially