fix: remove unused ConsumerContractBuilder contract_details accessor #196

Job	Run time
test-with-rack-2 (3.2, ubuntu-latest)	43s
test-with-active-support (2.7, ubuntu-latest)	58s
test-with-rack-2 (3.2, windows-latest)	4m 30s
test (2.7, ubuntu-latest)	52s
test-with-active-support (2.7, windows-latest)	6m 50s
test-with-rack-2 (3.2, macos-latest)	38s
test-with-active-support (2.7, macos-latest)	55s
test (2.7, windows-latest)	4m 47s
test (2.7, macos-latest)	46s
test-with-active-support (3.0, ubuntu-latest)	33s
test (3.0, ubuntu-latest)	26s
test-with-active-support (3.0, windows-latest)	4m 38s
test (3.0, windows-latest)	3m 18s
test-with-active-support (3.0, macos-latest)	34s
test-with-active-support (3.1, ubuntu-latest)	35s
test (3.0, macos-latest)	44s
test-with-active-support (3.1, windows-latest)	3m 56s
test (3.1, ubuntu-latest)	31s
test (3.1, windows-latest)	3m 21s
test-with-active-support (3.1, macos-latest)	38s
test (3.1, macos-latest)	39s
test-with-active-support (3.2, ubuntu-latest)	34s
test (3.2, ubuntu-latest)	33s
test-with-active-support (3.2, windows-latest)	4m 51s
test (3.2, windows-latest)	3m 48s
test-with-active-support (3.2, macos-latest)	28s
test (3.2, macos-latest)	39s
test (3.3, ubuntu-latest)	29s
test (3.3, windows-latest)	5m 8s
test (3.3, macos-latest)	47s
	58m 9s

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