Revert "Add API Field to Track Testing Classifications" #4479

Job	Run time
nondraft-pr	1s
lint-and-test / test-java	5m 20s
lint-and-test / test-ruby	11s
lint-and-test / test-python	2m 48s
codeql / Analyze (java)	5m 57s
codeql / Analyze (python)	4m 0s
codeql / Analyze (ruby)	3m 51s
svc-bgs-api / integration-test	8m 24s
ee-ep-merge-end-to-end / integration-test	12m 53s
svc-bip-api / integration-test	8m 4s
container-healthchecks / container-healthcheck	6m 9s
	57m 38s

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