bitq: remove dead code

bitq: remove dead code

field->in_value is already checked so it must be non-null here, which means
the else clause can never execute so the entire buffer allocation and
handling code is completely dead.

Change-Id: Id465012a7e607349401d554fc7a8e5db7e967998
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/205
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>