Remove vi-mode bindings for prettify/unprettify functionality

[rolandwalker]

Description

Fixes #1087 .

I thought this implementation was correct, but I don't use vi-mode, and we have an issue from a user who does. Best to remove the vi bindings. Perhaps someone who uses vi-mode can PR better bindings.

Checklist

• [x] I've added this contribution to the changelog.md.
• [x] I've added my name to the AUTHORS file (or it's already there).

[codecov-commenter]

Codecov Report

Base: 67.92% // Head: 66.59% // Decreases project coverage by -1.32% :warning:

Coverage data is based on head (660cf45) compared to base (48bd4c9). Patch coverage: 32.05% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1089      +/-   ##
==========================================
- Coverage   67.92%   66.59%   -1.33%     
==========================================
  Files          26       26              
  Lines        2756     2823      +67     
==========================================
+ Hits         1872     1880       +8     
- Misses        884      943      +59     

Impacted Files	Coverage Δ
mycli/clitoolbar.py	29.62% <0.00%> (-3.71%)	:arrow_down:
mycli/key_bindings.py	35.13% <20.00%> (-8.87%)	:arrow_down:
mycli/main.py	63.49% <27.27%> (-1.79%)	:arrow_down:
mycli/packages/completion_engine.py	61.90% <50.00%> (-0.17%)	:arrow_down:
mycli/sqlcompleter.py	81.89% <55.55%> (-2.39%)	:arrow_down:
mycli/completion_refresher.py	90.00% <80.00%> (-0.91%)	:arrow_down:
mycli/__init__.py	100.00% <100.00%> (ø)
mycli/config.py	62.23% <0.00%> (-1.07%)	:arrow_down:
... and 1 more

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[lgtm-com[bot]]

This pull request introduces 1 alert when merging 2980dcc01cf7b941e1322b781c018db522cb38d6 into bc9492a2d425c4d4908c1bfc97c316739a284b9f - view on LGTM.com

new alerts:

• 1 for Unused import