fix: simplify type complexity for cloudflare types

Author: pi0

src/presets/cloudflare/wrangler/_utils.ts

@@ -1,13 +1,3 @@
-// Extracted from miniflare
-export type Json =
-  | string
-  | number
-  | boolean
-  | {
-      [key: string]: Json;
-    }
-  | Json[];
-
 // Extracted from @types/yargs
 type PascalCase<S extends string> = string extends S
   ? string

src/presets/cloudflare/wrangler/environment.ts

@@ -6,8 +6,6 @@
  * Source: https://github.com/cloudflare/workers-sdk/blob/main/packages/wrangler/src/config/environment.ts
  */
 
-import type { Json } from "./_utils";
-
 /**
  * The `Environment` interface declares all the configuration fields that
  * can be specified for an environment.
@@ -455,7 +453,7 @@ export interface EnvironmentNonInheritable {
    * @default {}
    * @nonInheritable
    */
-  vars: Record<string, string | Json>;
+  vars: Record<string, unknown>;
 
   /**
    * A list of durable objects that your Worker should be bound to.