misleading and unnecessary fall through comments

Change-Id: I6309a484c3411bc1151ff2ccd276d70600854021
Reviewed-on: https://gerrit.libreoffice.org/67191
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

vcl/source/fontsubset/fontsubset.cxx

@@ -99,9 +99,7 @@ bool FontSubsetInfo::CreateFontSubset(
     case FontType::ANY_TYPE1:
         bOK = CreateFontSubsetFromType1( pOutGlyphWidths);
         break;
-        // fall through
     case FontType::NO_FONT:
-        // fall through
     default:
         OSL_FAIL( "unhandled type in CreateFontSubset()");
         break;