mkqt5bld: Remove unused PADDING variable

This seems to be a left over from 63076bbe

Change-Id: Ia50341d592a5cd22d7ae5ca89d68cc762f5bdaa2
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
mkqt5bld: Fix warning reported by pylint

This fixes a warning introduced by e09a4fc0

  W:400,0: Bad indentation. Found 11 spaces, expected 8

Change-Id: I0d136c80ccf2bba710fe10d2755708285e0efc4a
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>