package/mosh: remove unnecessary patch

According to upstream (keithw/mosh issue #650), it's okay to have the
"locale" system command fail with "command not found" because this is a
non-critical action that occurs just before Mosh exits with an error
anyway. Thus, this patch is unnecssary, and can be removed.

Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>