staging: r8188eu: remove unused macro READ_AND_CONFIG_TC

The macro READ_AND_CONFIG_TC is not used, remove it.
Found with GCC -Wunused-macros.

Acked-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210909110517.15243-1-straube.linux@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>