Remove qmljs debugging helper setup code from QtQuickApp template

Change-Id: Ia979c37c8f0ae77e2390951a547098461474313c
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
C++: Comment out debug log

Uncommented in e088541c0

Change-Id: Ia9685b815523ab61a8780e9f5686a5d713eec842
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>