Don't edit the operator's talk page if edit encounters errors

This is bad because
  - this is fragile -- the edit routines don't do proper error handling
  - this is annoying
    - this might encourage operators to omit the operator parameter
      to the constructor to avoid getting these notices
  - this removes control of error handling from the developer
  - this only deals with errors encountered while editing

Just remove it and let devs do the right thing.

Fixes gh-68