Disable deprecated ThumbEE support
Disable deprecated ThumbEE support

ThumbEE was used as a target for JIT compilers (like for Java), but was
deprecated in 2011. See
https://en.wikipedia.org/wiki/ARM_architecture#Thumb_Execution_Environment_(ThumbEE).

It's very unlikely that anyone is using it with Nerves due to it being
deprecated for a decade and not used by the BEAM.

nerves-project/nerves_system_bbb,nerves-project/nerves_system_bbb