staging: r8188eu: remove unused else condition

rtw_select_and_join_from_scanned_queue() cannot return '2' so this
else condition is unused. Remove this unnecessary else statement.

Suggested-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Jaehee Park <jhpark1013@gmail.com>
Link: https://lore.kernel.org/r/20220427153203.GA503502@jaehee-ThinkPad-X1-Extreme


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