CI: disable testing manylinux2014 #204

Job	Run time
Linux x64 (quay.io/pypa/manylinux_2_28_x86_64, 0)	2m 29s
macOS ARM64	1m 19s
Windows x64	1m 57s
macOS x64	2m 47s
Windows x86	2m 50s
	11m 22s

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