i18n: drop superfluous QObject* parent

These additional pointers were introduced for translations,
and needed their own tricks to get lupdate to recognize the
strings. Using QCoreApplication::translate() removes the
need to a QObject to provide context. Drop the now-unneeded
parameters.

src/libcalamares/utils/CommandList.h

@@ -88,7 +88,7 @@ public:
         return m_doChroot;
     }
 
-    Calamares::JobResult run( const QObject* parent );
+    Calamares::JobResult run();
 
     using CommandList_t::isEmpty;
     using CommandList_t::count;