staging: rtl8192e: Remove unused enum led_ctl_mode

Remove unused enum led_ctl_mode to shorten code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/554729dba4d9358bdd6146ebd8fa17a0f525702e.1687007788.git.philipp.g.hortmann@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>