Failed to fetch

W: Failed to fetch http://ppa.launchpad.net/brianmercer/php/ubuntu/dists/precise/main/source/Sources  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/brianmercer/php/ubuntu/dists/precise/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/brianmercer/php/ubuntu/dists/precise/main/binary-i386/Packages  404  Not Found


Solusi :
sudo rm /etc/apt/sources.list.d/*brianmercer*