Revert "Bug 10481: (follow-up) fix typo in POD"

This reverts commit 255b1144607feef3f25316f3710afa565f212065.
Revert "Bug 10481: Unit tests for C4::Members::AddEnrolmentFeeIfNeeded"

This reverts commit 262f1bb60823159c0d15707ac3cfe7ccb3cc4d8c.
Revert "Bug 10481: FIX No enrollment fee when changing patron category."

This reverts commit 7d6f83012a507b43d1de54bba47cf0dca94c7adb.