refactor: Clean up grpc services layer

[prmukherj]

Context

This tidy's up the grpc services code by fixing docstrings and deleting unwanted imports, etc.

Change Summary

1. Some unwanted imports were deleted.
2. Some files were put in their updated locations (just to improve readability throughout the repo).
3. Docstrings were properly set and cleaned up.

Impact

No user facing updates. Method docstings improve in documentations.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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