Remove long-deprecated khan-exercise.css

[jeremywiebe]

Summary:

Today's the day - rm khan-exercise.css.

The khan-exercise.css stylesheet is a very old set of styles for Perseus. Many of the styles apply to elements that live in webapp and not in Perseus so they don't even belong here. Some are unscoped and so also are just bad practices. Lastly, webapp applies a CSS Reset at the start of it's styles so I suspect most of the unscoped rules are clobbered anyways.

The remaining rules will either exist in webapp/mobile already or be for elements that no longer exist.

This file just confuses things so I'm removing it today!

Issue: --none--

Test plan:

Compare current PROD with what is available in the ZND for this PR.

Editor:

• code
  • Open an article that has CS content, such as "Public key encryption"
  • Open the editor for the article
  • Scroll down to "Section 2"
  • Hover over the tooltip below "Settings:"
  • CONFIRM: The text "Program.settings()" should look the same in both environments
• Preview area (also called "problemarea")
  • Navigate any exercise and open its editor
  • Verify that content has been added/setup
  • CONFIRM: The preview area looks the same in both environments

Widgets & Stuff:

• Graphie
  • Open an exercise or article with a Graphie widget included
  • CONFIRM: The graph looks the same and is positioned the same in both environments

[github-actions]

Size Change: -6 B (0%)

Total Size: 872 kB

Filename	Size	Change
packages/perseus-editor/dist/es/index.js	276 kB	-6 B (0%)

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	39.5 kB
packages/keypad-context/dist/es/index.js	760 B
packages/kmath/dist/es/index.js	11.1 kB
packages/math-input/dist/es/index.js	78.2 kB
packages/math-input/dist/es/strings.js	1.79 kB
packages/perseus-core/dist/es/index.js	29.8 kB
packages/perseus-linter/dist/es/index.js	22.8 kB
packages/perseus-score/dist/es/index.js	20.6 kB
packages/perseus/dist/es/index.js	367 kB
packages/perseus/dist/es/strings.js	6.74 kB
packages/pure-markdown/dist/es/index.js	4.14 kB
packages/simple-markdown/dist/es/index.js	13.1 kB

_{compressed-size-action}

[khan-actions-bot]

Gerald

Required Reviewers

• @Khan/perseus for changes to .changeset/lovely-seahorses-hide.md, packages/perseus/src/styles/perseus-renderer.less

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.64%. Comparing base (720e3bf) to head (0c59381).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #875      +/-   ##
==========================================
+ Coverage   70.00%   70.64%   +0.63%     
==========================================
  Files         514      517       +3     
  Lines      106133   106166      +33     
  Branches     7629    11489    +3860     
==========================================
+ Hits        74296    74996     +700     
+ Misses      31720    31170     -550     
+ Partials      117        0     -117     

see 124 files with indirect coverage changes

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[github-actions]

npm Snapshot: Published

Good news!! We've packaged up the latest commit from this PR (5ff208c) and published it to npm. You
can install it using the tag PR875.

Example:

pnpm add @khanacademy/perseus@PR875

If you are working in Khan Academy's webapp, you can run:

./dev/tools/bump_perseus_version.sh -t PR875

[handeyeco]

This is great 🎉 Makes me a little nervous with the upcoming mobile app release though.

• Should we wait to land this until after the release?
• Do we need a full QE Perseus pass to check for issues?

[mark-fitzgerald]

This appears to be used in legacy code.