C++: Remove redundant assignment
C++: Remove redundant assignment

TranslationUnit assigns itself to the control in its ctor.

Change-Id: I08cf70c32f557648709e29b03c2f939d294fdc6d
Reviewed-by: Nikolai Kosjar <9571db158ca61a0d070db010803474231fa0cbab@theqtcompany.com>

martyone/sailfish-qtcreator,xianian/qt-creator,xianian/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,xianian/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator