Clean up after renaming the be channel to main. (#115) #342

Job	Run time
test_arch	20s
test (ubuntu-latest, 2.12.4)	30s
test_latest_patch_release (2.19)	15s
test (ubuntu-latest, stable)	26s
test_inferred_channels (2.12.0-29.10.beta)	12s
test_latest_patch_release (3)	9s
test (ubuntu-latest, beta)	29s
test_raw (ubuntu-latest, dev, raw)	11s
test_latest_patch_release (3.1)	10s
test (ubuntu-latest, dev)	25s
test_raw (ubuntu-latest, main, raw)	12s
test (macos-latest, 2.12.4)	37s
test_raw (macos-latest, dev, raw)	21s
test (macos-latest, stable)	45s
test_raw (macos-latest, main, raw)	27s
test (macos-latest, beta)	1m 0s
test_raw (windows-latest, dev, raw)	36s
test_raw (windows-latest, main, raw)	19s
test (macos-latest, dev)	45s
test (windows-latest, 2.12.4)	41s
test (windows-latest, stable)	1m 15s
test (windows-latest, beta)	52s
test (windows-latest, dev)	1m 11s
	12m 8s

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