Open '/etc/yum.repos.d/mratwork.repo' and then change:
from:
# for mod-pagespeed
[mratwork-google-mod-pagespeed]
name=MRatWork - google-mod-pagespeed
baseurl=http://dl.google.com/linux/mod-pagespeed/rpm/stable/$basearch
enabled=1
gpgcheck=0
to:
# for mod-pagespeed
[mratwork-google-mod-pagespeed]
name=MRatWork - google-mod-pagespeed
baseurl=http://dl.google.com/linux/mod-pagespeed/rpm/stable/$basearch
enabled=0
gpgcheck=0