remove mkPhpTags which uses phpctags

Signed-off-by: BlackEagle <ike.devolder@gmail.com>
mkTags :: just general tag generation

Signed-off-by: BlackEagle <ike.devolder@gmail.com>
mkPhpTags :: generate specific php tagfiles

Signed-off-by: BlackEagle <ike.devolder@gmail.com>