Update CompilerImports.fs

src/fsharp/CompilerImports.fs

@@ -707,11 +707,9 @@ type TcImportsSafeDisposal
         if verbose then 
             dprintf "disposing of TcImports, %d binaries\n" disposeActions.Count
 #if !NO_EXTENSIONTYPING
-        async {
-            let actions = disposeTypeProviderActions
-            if actions.Count > 0 then
-                TypeProviderLock.Singleton.AcquireLock(fun _ -> for action in actions do action())
-        } |> Async.Start // Make this async so we do not block dispose
+        let actions = disposeTypeProviderActions
+        if actions.Count > 0 then
+            TypeProviderLock.Singleton.AcquireLock(fun _ -> for action in actions do action())
 #endif
         for action in disposeActions do action()