Don't crash on extension update check

We don't need to release the SolarMutex, as we don't own it.

Change-Id: Id0a0ae8d478dc56d0da2ab296f8031e935920c97

uui/source/iahndl.cxx

@@ -172,7 +172,6 @@ UUIInteractionHelper::handleRequest(
         HandleData aHD(rRequest);
         Link<void*,void> aLink(&aHD,handlerequest);
         Application::PostUserEvent(aLink,this);
-        SolarMutexReleaser aReleaser;
         aHD.wait();
         return aHD.bHandled;
     }
@@ -224,7 +223,6 @@ UUIInteractionHelper::getStringFromRequest(
         HandleData aHD(rRequest);
         Link<void*,void> aLink(&aHD,getstringfromrequest);
         Application::PostUserEvent(aLink,this);
-        SolarMutexReleaser aReleaser;
         aHD.wait();
         return aHD.m_aResult;
     }