shape.h: remove YJIT workaround #621

Job	Run time
omnibus compilations, trigger	3s
omnibus compilations, #8	27m 9s
omnibus compilations, #11	26m 55s
omnibus compilations, #2	32m 50s
omnibus compilations, #4	25m 12s
omnibus compilations, #9	26m 40s
omnibus compilations, #3	31m 0s
omnibus compilations, #6	27m 0s
omnibus compilations, #10	27m 8s
omnibus compilations, #12	24m 26s
omnibus compilations, #1	28m 19s
omnibus compilations, #7	32m 50s
omnibus compilations, #5	27m 29s
omnibus compilations, result	11s
	5h 37m 12s

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