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test: drop hollow prompt and span pins #4101

Job	Run time
static-analysis	38s
test (3/4)	53s
test (2/4)	1m 9s
test (1/4)	47s
build	11s
test (4/4)	36s
test (one-process pollution detector)	-1s
typecheck	3s
eslint	4s
prettier	3s
test (src)	3s
build-and-test	4s
	4m 30s