[FSSDK-11090] remove unused log messages (#988) #980

Job	Run time
crossbrowser_and_umd_unit_tests	6h 0m 13s
lint	1m 5s
unit_tests (16)	1m 42s
unit_tests (18)	1m 34s
unit_tests (20)	1m 22s
unit_tests (22)	1m 24s
fullstack_production_suite / test	6s
integration_tests / test	4s
lint_markdown_files / lint	1m 3s
Coveralls coverage	3s
	6h 8m 36s

Provide feedback