Revert "Merge pull request #303 from kelseyq/set_field_position_by_alphabetical_order"

This reverts commit 31cde8f417064d2f83d5ccce780814a72c4a2e1a, reversing
changes made to 337e918c25e858861353996bce630ad866834172.
Merge pull request #304 from kelseyq/2.3.x_2.10

Revert "Merge pull request #303 from kelseyq/set_field_position_by_alphabetical_order"