cleanup: Remove unused methods

[saikiranakula-amzn]

Issue #, if available:

Description of changes:
Remove unused code block

Testing done:
Build ran successfully

make[2]: Leaving directory '/home/ec2-user/credentials-fetcher/build'
make  -f api/tests/CMakeFiles/gmsa_test_client.dir/build.make api/tests/CMakeFiles/gmsa_test_client.dir/build
make[2]: Entering directory '/home/ec2-user/credentials-fetcher/build'
make[2]: Nothing to be done for 'api/tests/CMakeFiles/gmsa_test_client.dir/build'.
make[2]: Leaving directory '/home/ec2-user/credentials-fetcher/build'
[100%] Built target gmsa_test_client
make[1]: Leaving directory '/home/ec2-user/credentials-fetcher/build'
/usr/bin/cmake -E cmake_progress_start /home/ec2-user/credentials-fetcher/build/CMakeFiles 0

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