[backend] remove unused dependencies (#12514)

[lndrtrbn]

Proposed changes

• Remove backend dependencies that are not used

Related issues

• [backend] Remove unused dependencies #12514

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.46%. Comparing base (930c3de) to head (c087f1f).
⚠️ Report is 11 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12519      +/-   ##
==========================================
+ Coverage   66.40%   66.46%   +0.05%     
==========================================
  Files         752      752              
  Lines       79559    79692     +133     
  Branches     8544     8640      +96     
==========================================
+ Hits        52835    52970     +135     
+ Misses      26724    26722       -2     

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