Remove erroneous line

This was being used to test the case for reblogging from the reader screen. It broke reblogging from the post detail screen.
Improve perf of adding many blogs in NUX/settings

- Inserting individual sections for adding many blogs was degrading the performance of the app

- Replaced with a reloadData.

- Caveat: removing many blogs one at a time will cause there to be more reloadDatas, but this still actually is more performant than removing the section.