* Remove incorrect override for LWIP_PLATFORM_ASSERT
LWIP_PLATFORM_ASSERT macro is used by lwip driver implementations to specify the behavior of the assertions in lwip code.
The previous override of this macro incorrectly assumed that the parameter to the function macro was the condition to check. However this is incorrect. The parameter is actually a message string defining what failed.
This mistake caused all assertions to be ignored. ( and myself to loose many hours of debugging time )
By removing this, we restore the default behavior specified by lwip which is to use `printf` to log the message.
* I think i prefer to use panic (which doesn't pull in fflush etc)
Co-authored-by: Graham Sanderson <graham.sanderson@gmail.com>