Remove references for: athdebug(8), athstats(8) and wlanstats(8)
Those are tools in the tools/ directory that are not built as part of the base
system. According to the tools/README file:
"...these tools are not meant to be built as part of the standard system..."
It does not make sense to reference manpages that are not included in the base
Even more, the tools/tools/README' is not udpated and wlanstats` does not even
build on current:
error: cast from 'struct sockaddr *' to 'const struct sockaddr_dl *' increases required alignment from 1 to 2 [-Werror,-Wcast-align]