Remove the remote editor plugin.

[mdickinson]

The remote editor plugin has been unmaintained for many years, and is untested and apparently unused.

This PR removes it.

I won't merge immediately; I want to give this a few days to check with other people about the history. If there are no objections, I'll merge in a few days' time.

Closes #134

[codecov-io]

Codecov Report

Merging #137 into master will increase coverage by 0.47%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #137      +/-   ##
=========================================
+ Coverage   38.93%   39.4%   +0.47%     
=========================================
  Files         171     155      -16     
  Lines        5293    4575     -718     
  Branches      610     516      -94     
=========================================
- Hits         2061    1803     -258     
+ Misses       3164    2733     -431     
+ Partials       68      39      -29

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 035b18c...8ca9e64. Read the comment docs.

[rahulporuri]

LGTM.

[mdickinson]

I want to give this a few days to check with other people about the history.

Done. Merging.