iwlwifi: remove old unsupported older than 4.14 LTS

iwlwifi: remove old unsupported older than 4.14 LTS

The 4.9 LTS is now EOL so we can now drop the older firmware
that was required by the 4.4 LTS series. This removes the
extra iwlwifi 1k/3k/5k/6k/7k/8k/9k series of device that
are no longer used by a supported kernel series.

Cc: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>