build: remove unused @edx/reactifex package

[feanil]

Remove @edx/reactifex package from devDependencies as it is no longer
needed. Translation extraction functionality has been verified to work
correctly without this dependency.

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.14%. Comparing base (b106d06) to head (1c9e20e).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #256   +/-   ##
=======================================
  Coverage   84.14%   84.14%           
=======================================
  Files          47       47           
  Lines         700      700           
  Branches      135      135           
=======================================
  Hits          589      589           
  Misses        111      111           

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[feanil]

@openedx/committers-frontend Can you check my approach on this, when I updated the package.json and re-built package-lock.json for a different change (dropping reactifex), it pulled in a new version of frontend-component-header which now has typescript components. Adding the tsconfig and updating the eslint ignore seems to have gotten the build passing but I wanted to make sure it's the correct approach before I apply the changes to other related PRs that are seeing this issue.

[brian-smith-tcril]

These changes look similar to the ones made in #254

It seems openedx/frontend-component-header#604 should have landed as a breaking change, but renovate landed it on repos that already had tsconfig.json files so it went unnoticed.

[bradenmacdonald]

Looking at the log, it shows errors about @edx/frontend-component-header/dist/studio-header/StudioHeader.tsx which seems wrong for two reasons: (1) this is not part of the authoring MFE, so why is it referencing the Studio header at all?, and (2) why are there .tsx files in the dist folder ? Seems like frontend-component-header was not built properly. (Or are we doing some kind of hybrid build that outputs .tsx files?!)

[brian-smith-tcril]

Looking at the log, it shows errors about @edx/frontend-component-header/dist/studio-header/StudioHeader.tsx which seems wrong for two reasons: (1) this is not part of the authoring MFE, so why is it referencing the Studio header at all?, and (2) why are there .tsx files in the dist folder ? Seems like frontend-component-header was not built properly. (Or are we doing some kind of hybrid build that outputs .tsx files?!)

The build step does seem a bit odd (https://github.com/openedx/frontend-component-header/blob/ecf7f1dfc1da11ae32c36f4cae5fcfb45733ea5b/Makefile#L8-L14)

For now I've just marked the 6.5.x and 6.6.x versions as deprecated on NPM and released the latest version as 7.0.0