compat-wireless: Remove

* some layers already have recipes for linux-backports
* don't know about anyone still using this and fails in default setups
  | make -C /home/jenkins/oe/world/shr-core/tmp-glibc/work-shared/qemuarm/kernel-source M=/home/jenkins/oe/world/shr-core/tmp-glibc/work/qemuarm-oe-linux-gnueabi/compat-wireless-all/3.6.8-r1.0/compat-wireless-3.6.8-1 modules
  | make[1]: Entering directory `/home/jenkins/oe/world/shr-core/tmp-glibc/work-shared/qemuarm/kernel-source'
  | make[2]: Entering directory `/home/jenkins/oe/world/shr-core/tmp-glibc/work-shared/qemuarm/kernel-build-artifacts'
  | /home/jenkins/oe/world/shr-core/tmp-glibc/work/qemuarm-oe-linux-gnueabi/compat-wireless-all/3.6.8-r1.0/compat-wireless-3.6.8-1/config.mk:21: *** "ERROR: compat-wireless by default supports kernels >= 2.6.24, try enabling only one driver though".  Stop.
  | make[2]: *** [_module_/home/jenkins/oe/world/shr-core/tmp-glibc/work/qemuarm-oe-linux-gnueabi/compat-wireless-all/3.6.8-r1.0/compat-wireless-3.6.8-1] Error 2
  | make[2]: Leaving directory `/home/jenkins/oe/world/shr-core/tmp-glibc/work-shared/qemuarm/kernel-build-artifacts'

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>