Revert "Added method to return array of plugin versions that require db update"
Reverting the screwy conflict merges
This reverts commit 1fceb01dfeecff349f57cee922254de0bacb4ce8.
Revert "Convert each database change to a static method using update_xxx as naming convention"

This reverts commit 6b6d69d969dd55db627ff4cd15bc839cf2797807.