refactor: remove duplicate PagesConfigFields interface (#7363)

packages/wrangler/src/config/config.ts

@@ -30,18 +30,6 @@ export type RawConfig = Partial<ConfigFields<RawDevConfig>> &
 	DeprecatedConfigFields &
 	EnvironmentMap & { $schema?: string };
 
-// Pages-specific configuration fields
-interface PagesConfigFields {
-	/**
-	 * The directory of static assets to serve.
-	 *
-	 * The presence of this field in a Wrangler configuration file indicates a Pages project,
-	 * and will prompt the handling of the configuration file according to the
-	 * Pages-specific validation rules.
-	 */
-	pages_build_output_dir?: string;
-}
-
 export interface ConfigFields<Dev extends RawDevConfig> {
 	configPath: string | undefined;