Tests

Remove export_map logic #19885

Job	Run time
Test mypyc suite with 32-bit Python	9m 12s
Test suite with py314t-ubuntu, mypyc-compiled	16m 33s
Type check our own code (py310-ubuntu)	1m 42s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 25s
Test suite with py313-ubuntu, mypyc-compiled	14m 6s
Test suite with py314-windows-64	26m 56s
mypyc runtime tests with py310-ubuntu	5m 9s
Test suite with py311-ubuntu	9m 6s
Parallel tests with py314-ubuntu, interpreted	23m 16s
Type check our own code (py310-windows-64)	2m 29s
Test suite with py310-ubuntu, mypyc-compiled	14m 1s
Test suite with py314-ubuntu, mypyc-compiled	14m 19s
mypyc runtime tests with py313-macos	5m 13s
Test suite with py312-ubuntu	9m 57s
Formatting and code style with Black + ruff	1m 48s
	3h 3m 12s

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