Core: Merge Find and Locator into Core plugin

Change-Id: I7053310272235d854c9f409670ff52a10a7add8b
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/texteditor/findinopenfiles.cpp

@@ -37,7 +37,6 @@
 
 #include <QSettings>
 
-using namespace Find;
 using namespace TextEditor;
 using namespace TextEditor::Internal;