[chore] Remove unused method from grpc handler

[mahadzaryab1]

Which problem is this PR solving?

• Addresses [storage] Remove distinction between primary and archive storage interfaces #6567 (comment)

Description of the changes

• Removes an unused method for creating a grpc handler

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: npm run lint and npm run test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.24%. Comparing base (862f1a3) to head (0f0568a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6580      +/-   ##
==========================================
- Coverage   96.24%   96.24%   -0.01%     
==========================================
  Files         373      373              
  Lines       21406    21389      -17     
==========================================
- Hits        20602    20585      -17     
  Misses        612      612              
  Partials      192      192              

Flag	Coverage Δ
badger_v1	10.65% <ø> (+0.01%)	⬆️
badger_v2	2.78% <ø> (+<0.01%)	⬆️
cassandra-4.x-v1-manual	16.61% <ø> (+0.02%)	⬆️
cassandra-4.x-v2-auto	2.71% <ø> (+<0.01%)	⬆️
cassandra-4.x-v2-manual	2.71% <ø> (+<0.01%)	⬆️
cassandra-5.x-v1-manual	16.61% <ø> (+0.02%)	⬆️
cassandra-5.x-v2-auto	2.71% <ø> (+<0.01%)	⬆️
cassandra-5.x-v2-manual	2.71% <ø> (+<0.01%)	⬆️
elasticsearch-6.x-v1	20.39% <ø> (+0.03%)	⬆️
elasticsearch-7.x-v1	20.47% <ø> (+0.04%)	⬆️
elasticsearch-8.x-v1	20.63% <ø> (+0.04%)	⬆️
elasticsearch-8.x-v2	2.77% <ø> (+<0.01%)	⬆️
grpc_v1	12.17% <ø> (+0.01%)	⬆️
grpc_v2	9.04% <ø> (+0.01%)	⬆️
kafka-3.x-v1	10.34% <ø> (+0.01%)	⬆️
kafka-3.x-v2	2.78% <ø> (+<0.01%)	⬆️
memory_v2	2.78% <ø> (+0.01%)	⬆️
opensearch-1.x-v1	20.52% <ø> (+0.03%)	⬆️
opensearch-2.x-v1	20.52% <ø> (+0.04%)	⬆️
opensearch-2.x-v2	2.77% <ø> (-0.01%)	⬇️
tailsampling-processor	0.51% <ø> (+<0.01%)	⬆️
unittests	95.09% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

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