simplify context version #493

Job	Run time
test (test-conformance-cljs)	2m 33s
test (test-lib-cljs)	1m 18s
test (test-lib-clj)	52s
test (test-conformance-clj-sync)	2m 3s
test (npm-audit)	21s
test (test-conformance-clj-async)	1m 43s
	8m 50s

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