Remove test duplication

[demizer]

There are two files for tests:

logger_test.go
logger_std_test.go

logger_test.go tests features using a new logger object. logger_std_test.go uses the standard logger object.

We really only need to test the standard logging object. Tests in logger_std_test.go should not be duplicated in logger_test.go unless needed.

[demizer]

Removing would lower the test coverage score. Merging the tests so each test tests the standard logger and a logger object would be better... possibly.