Remove apc references
apc.so was removed from heroku-buildpack-wordpress 8 months ago, comment it out in php.ini. https://github.com/mchung/heroku-buildpack-wordpress/commit/bf7f635076a1eb541257f8a5da5d9fd2067f348f
Merge pull request #14 from mchung/disable-apc

Remove apc references