TV: Remove database initialisation lock

- this may have worked asynchronously in the past, but the current
implementation initialises the settings from the db in the constructor
(InitFromDB) which always (!) preceeds the call to Init - which waits
for the db...

mythtv/libs/libmythtv/tv_play.cpp

@@ -1104,10 +1104,6 @@ void TV::InitFromDB()
 
     gCoreContext->addListener(this);
     gCoreContext->RegisterForPlayback(this, SLOT(StopPlayback()));
-
-    QMutexLocker lock(&m_initFromDBLock);
-    m_initFromDBDone = true;
-    m_initFromDBWait.wakeAll();
 }
 
 /** \fn TV::Init(bool)
@@ -1176,15 +1172,6 @@ bool TV::Init()
     mainwindow->installEventFilter(this);
     QCoreApplication::processEvents();
 
-    {
-        QMutexLocker locker(&m_initFromDBLock);
-        while (!m_initFromDBDone)
-        {
-            QCoreApplication::processEvents();
-            m_initFromDBWait.wait(&m_initFromDBLock, 50);
-        }
-    }
-
     GetPlayerReadLock();
     m_playerContext.m_ffRewState = 0;
     m_playerContext.m_ffRewIndex = kInitFFRWSpeed;

mythtv/libs/libmythtv/tv_play.h

@@ -681,10 +681,6 @@ class MTV_PUBLIC TV : public QObject, public MenuItemDisplayer, public Reference
     QElapsedTimer     m_ctorTime;
     uint              m_switchToInputId {0};
 
-    QMutex            m_initFromDBLock;
-    bool              m_initFromDBDone {false};
-    QWaitCondition    m_initFromDBWait;
-
     /// True if the user told MythTV to stop plaback. If this is false
     /// when we exit the player, we display an error screen.
     mutable bool      m_wantsToQuit {true};