links, links-x11: remove unrecognized configure options

* fixes following QA warnings:
  links-2.7: links: configure was passed unrecognised options:
    --enable-javascript --with-libfl --without-sdl
    [unknown-configure-option]
  links-x11-2.7: links-x11: configure was passed unrecognised options:
    --enable-javascript --with-libfl --without-sdl
    [unknown-configure-option]

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>