Revert "Add workaround for CentOS 5 :<"
Revert "Add workaround for CentOS 5 :<"

This reverts commit 7506b3b3647f551cd584c21fae547ac434a66042.

There is no need to apply this workaround
because CentOS 5 support will be dropped.

mroonga/mroonga,mroonga/mroonga,mroonga/mroonga,mroonga/mroonga