Remove no longer needed identifier jquery repeat

[cdrini]

Closes #10126
Closes #10125

Since this was removed in #10032 , this is triggering an error which is causing issues for downstream JS

Technical

Testing

• Autocomplete appears for work, language on book edit page
• Can remove classification rows

Screenshot

Stakeholders

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 17.44%. Comparing base (347bff9) to head (0d82393).
Report is 131 commits behind head on master.

Files with missing lines	Patch %	Lines
openlibrary/plugins/openlibrary/js/index.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10127      +/-   ##
==========================================
+ Coverage   17.12%   17.44%   +0.31%     
==========================================
  Files          89       89              
  Lines        4752     4792      +40     
  Branches      831      846      +15     
==========================================
+ Hits          814      836      +22     
- Misses       3428     3438      +10     
- Partials      510      518       +8     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[cdrini]

Auto-merging this one; small high priority change which I want to send out before the weekend since a good chunk of the edit page is not working correctly.