LanguageClient: Do not send initializing request twice

Amends dc268e3157.

Change-Id: I6ca81ec336f09c02b26f47b5e00bebbc54882ed6
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/languageclient/client.cpp

@@ -312,7 +312,6 @@ void Client::initialize()
 
     // directly send message otherwise the state check of sendContent would fail
     sendMessage(initRequest.toBaseMessage());
-    m_clientInterface->sendMessage(initRequest.toBaseMessage());
     m_state = InitializeRequested;
 }