Remove #ifdef for platforms where QChar was packed -- there aren't any

On ARM OABI, sizeof(QChar) was 4, so we used to pack it so QChar[] was
isomorphic to ushort[]. We don't support the OABI anymore and the EABI
does the right thing.

Change-Id: I181dd2f169f6868450302e269ef9ad5d643f306f
Merge-request: 13
Reviewed-by: Olivier Goffart <olivier.goffart@nokia.com>
Reviewed-on: http://codereview.qt.nokia.com/1386
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>

src/corelib/tools/qchar.h

@@ -228,11 +228,7 @@ public:
     char toAscii() const;
     inline char toLatin1() const;
     inline ushort unicode() const { return ucs; }
-#ifdef Q_NO_PACKED_REFERENCE
-    inline ushort &unicode() { return const_cast<ushort&>(ucs); }
-#else
     inline ushort &unicode() { return ucs; }
-#endif
 
     static QChar fromAscii(char c);
     static QChar fromLatin1(char c);