Fix extraneous asdf in withProgress output

Problem: There is a `putStrLn "asdf"` that causes VSCode to fail when
using `withProgress`.

Solution: Remove offending line.

Author: heitor-lassarote

lsp/src/Language/LSP/Server/Core.hs

@@ -649,7 +649,6 @@ withProgressBase indefinite title cancellable f = do
 
   return res
   where updater progId (ProgressAmount percentage msg) = do
-          liftIO $ putStrLn "asdf"
           sendNotification SProgress $ fmap Report $ ProgressParams progId $
               WorkDoneProgressReportParams Nothing msg percentage