remove rogue clara jar (and strip down EB 2-particle test script) #2614

Job	Run time
java_matrix	3s
build (macos-latest)	3m 8s
download_test_data	4s
build (ubuntu-latest)	2m 57s
unit_tests (25)	3m 15s
unit_tests (21)	3m 7s
spotbugs	7m 53s
test_clara	4m 54s
test_decoder	2m 1s
test_run-groovy	1m 21s
test_coatjava (ubuntu-latest, eb-eftpi)	1m 31s
test_coatjava (ubuntu-latest, kpp)	1m 39s
test_coatjava (ubuntu-latest, eb-epc)	1m 35s
test_coatjava (ubuntu-latest, eb-enc)	1m 47s
test_coatjava (ubuntu-latest, eb-eg)	1m 34s
test_coatjava (ubuntu-latest, eb-ep)	1m 46s
test_coatjava (macos-latest, eb-ep, ./run-eb-tests.sh -100 electronproton)	1m 48s
release_build	0s
generate_documentation	1m 4s
deploy_web_pages	-1s
final	0s
	41m 26s

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