Remove arrow key navigation temporarily so link boundaries work again

[ellatrix]

No description provided.

[codecov]

Codecov Report

Merging #2453 into master will increase coverage by 0.02%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #2453      +/-   ##
==========================================
+ Coverage   26.75%   26.77%   +0.02%     
==========================================
  Files         158      158              
  Lines        4882     5049     +167     
  Branches      820      877      +57     
==========================================
+ Hits         1306     1352      +46     
- Misses       3023     3100      +77     
- Partials      553      597      +44

Impacted Files	Coverage Δ
editor/modes/visual-editor/block.js	0% <0%> (ø)	⬆️
blocks/editable/index.js	9.57% <0%> (-1.54%)	⬇️
blocks/api/paste/normalise-blocks.js	95.74% <0%> (-0.93%)	⬇️
editor/sidebar/table-of-contents/item.js	0% <0%> (ø)	⬆️
blocks/api/paste/strip-attributes.js	100% <0%> (ø)	⬆️
blocks/api/paste/strip-wrappers.js	100% <0%> (ø)	⬆️
editor/sidebar/table-of-contents/index.js	0% <0%> (ø)	⬆️
blocks/api/paste/index.js	100% <0%> (ø)	⬆️
blocks/editable/format-toolbar/index.js	10% <0%> (+2.5%)	⬆️

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