remove object, context property and message property from perseus strings

[anakaren-rojas]

Summary:

Updates the interactive graph perseus strings - removes the object, context and message properties. Keeps strings

Issue: XXX-XXXX

Test plan:

yarn test

[github-actions]

npm Snapshot: Published

Good news!! We've packaged up the latest commit from this PR (f854bfc) and published it to npm. You
can install it using the tag PR2076.

Example:

yarn add @khanacademy/perseus@PR2076

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

./dev/tools/bump_perseus_version.sh -t PR2076

[github-actions]

Size Change: -404 B (-0.03%)

Total Size: 1.28 MB

Filename	Size	Change
packages/perseus/dist/es/strings.js	4.63 kB	-404 B (-8.03%)	✅

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	39 kB
packages/keypad-context/dist/es/index.js	760 B
packages/kmath/dist/es/index.js	4.27 kB
packages/math-input/dist/es/index.js	78 kB
packages/math-input/dist/es/strings.js	1.79 kB
packages/perseus-core/dist/es/index.js	1.48 kB
packages/perseus-editor/dist/es/index.js	688 kB
packages/perseus-linter/dist/es/index.js	22.2 kB
packages/perseus/dist/es/index.js	419 kB
packages/pure-markdown/dist/es/index.js	3.67 kB
packages/simple-markdown/dist/es/index.js	12.5 kB

_{compressed-size-action}