Revert "Make the main client file updateable"

This reverts commit c821544.

Author: jverce

.fernignore

@@ -26,6 +26,7 @@ src/wrapper
 
 # Ideally, we shouldn't. But until Fern supports the changes that we've made we
 # have to override some parts.
+src/Client.ts
 
 # Custom auth files
 src/core/auth/index.ts