staging: rtl8188eu: remove constant variable and dead code

staging: rtl8188eu: remove constant variable and dead code

g_wifi_on is always true. Remove the variable and the code that would
be run only if g_wifi_on was false.

While at it, remove a pointlesss comment that starts with /** and is
misinterpreted as a kernel-doc comment.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210419201126.25633-2-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>