resource_limits: Delete settings for httpd

Delete settings in resource_limits.conf that are no longer used.  In particular, commit 3b74dd3d162a9a3b63a7ac4e1eaccea6b889e186 (removing v1 cartridges) removed all use of the apache_bandwidth, apache_maxconnection, apache_bandwidtherror, rotatelogs_interval, and rotatelogs_format settings.