refactor(yaml-parser): Remove unused RawContract type definition

- Eliminated the `RawContract` type definition from the `yaml-parser.ts` file to streamline the code and improve maintainability.

Author: Jrigada

private-rpc/src/permissions/yaml-parser.ts

@@ -53,8 +53,6 @@ const contractSchema = z.object({
     methods: z.array(methodSchema)
 });
 
-type RawContract = z.infer<typeof contractSchema>;
-
 const yamlSchema = z.object({
     whitelisted_wallets: z.union([
         z.array(addressSchema).nonempty({