This reverts commit e1382cc7d6.
Due to restrictive simplelink host driver source licensing.
This also reverts commits based on the simplelink wifi host
driver:
Revert "ext: simplelink: host driver: depend on multithreading"
commit: 4d912b004b
Revert "ext: simplelink: Enable SimpleLink to use Zephyr __errno"
commit: 4e022f7b28
Revert "ext: simplelink: Add SimpleLink DPL porting layer to Zephyr"
commit: 4bc51e67d4
Revert "ext: simplelink: Enable build of the SimpleLink host driver."
commit: 2d2615a49a
Signed-off-by: Gil Pitney <gil.pitney@linaro.org>