refactor: remove UI build configuration files and related exports

Author: tsck

src/ui/build/config.ts

@@ -1,3 +1,2 @@
 export { UIRegistry, getDefaultUIRegistry, setDefaultUIRegistry } from "./registry/index.js";
 export { useRenderData } from "./hooks/index.js";
-export { createUIBuildConfig } from "./build/index.js";