Code cleanup

[Myllyenko]

Code cleanup powered by IDEA checks.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.45872% with 54 lines in your changes missing coverage. Please review.

Project coverage is 59.25%. Comparing base (50b241a) to head (bca8ab5).

Files with missing lines	Patch %	Lines
...src/main/java/tech/ydb/table/impl/BaseSession.java	46.87%	14 Missing and 3 partials ⚠️
...ava/tech/ydb/auth/OAuth2TokenExchangeProvider.java	66.66%	0 Missing and 7 partials ⚠️
...n/java/tech/ydb/table/values/proto/ProtoValue.java	0.00%	5 Missing ⚠️
...n/java/tech/ydb/coordination/impl/SessionImpl.java	0.00%	4 Missing ⚠️
...ain/java/tech/ydb/table/values/PrimitiveValue.java	0.00%	2 Missing ⚠️
...in/java/tech/ydb/topic/impl/GrpcStreamRetrier.java	33.33%	0 Missing and 2 partials ⚠️
...ain/java/tech/ydb/coordination/impl/StreamMsg.java	80.00%	1 Missing ⚠️
...in/java/tech/ydb/core/auth/BackgroundIdentity.java	0.00%	1 Missing ⚠️
...ain/java/tech/ydb/core/impl/BaseGrpcTransport.java	0.00%	1 Missing ⚠️
...ava/tech/ydb/core/impl/SingleChannelTransport.java	0.00%	1 Missing ⚠️
... and 13 more

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #499      +/-   ##
============================================
+ Coverage     59.23%   59.25%   +0.02%     
+ Complexity     2222     2221       -1     
============================================
  Files           327      327              
  Lines         13455    13452       -3     
  Branches       1344     1338       -6     
============================================
+ Hits           7970     7971       +1     
- Misses         4871     4876       +5     
+ Partials        614      605       -9     

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[Myllyenko]

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