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remove unused imports and variables, run auto-indenter #3345

Job	Run time
build	3m 9s
download_test_data	4s
java_matrix	3s
build_macos	3m 52s
unit_tests (21)	2m 58s
unit_tests (25)	3m 0s
generate_documentation	1m 3s
test_clara	4m 23s
test_run-groovy	1m 0s
test_decoder	2m 8s
spotbugs	8m 6s
test_coatjava (ubuntu-latest, eb-eftpi)	2m 11s
test_coatjava (ubuntu-latest, eb-eg)	2m 6s
test_coatjava (ubuntu-latest, kpp)	2m 53s
test_coatjava (ubuntu-latest, eb-epc)	2m 2s
test_coatjava (ubuntu-latest, eb-ep)	2m 13s
test_coatjava (ubuntu-latest, eb-enc)	2m 14s
test_coatjava (ubuntu-latest, eb-en)	2m 6s
release_build	0s
test_coatjava_macos	4m 10s
deploy_web_pages	-1s
final	2s
	49m 42s