Remove a suspect ungetc() call in VHDL parser

This ungetc() call don't look legitimate and actually leads to lots
of warnings about ungetc() being called when another character was
already backed up.

tagmanager/ctags/vhdl.c

@@ -190,7 +190,6 @@ static void tagNameList (const vhdlKind kind, int c)
 	{
 		readIdentifier (TagName, c);
 		makeSimpleTag (TagName, VhdlKinds, kind);
-		vUngetc (c);
 	}
 }