Remove empty documentation entry

[blink1073]

If the only documentation PR(s) were automated, remove that entry from the changelog.

[codecov-commenter]

Codecov Report

Merging #211 (52ee8c4) into master (7b86488) will decrease coverage by 0.07%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #211      +/-   ##
==========================================
- Coverage   84.75%   84.67%   -0.08%     
==========================================
  Files          19       19              
  Lines        2276     2278       +2     
  Branches      283      284       +1     
==========================================
  Hits         1929     1929              
- Misses        249      250       +1     
- Partials       98       99       +1     

Impacted Files	Coverage Δ
jupyter_releaser/changelog.py	87.15% <0.00%> (-1.63%)	⬇️

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