Fix method python method call without self #1828

Job	Run time
build-spidermonkey-win	11s
build-spidermonkey-unix (ubuntu-20.04, 3.10)	5s
sdist	39s
build-spidermonkey-unix (macos-13, 3.10)	6s
build-spidermonkey-unix (macos-14, 3.10)	6s
build-spidermonkey-unix (pi, 3.10)	5s
check-install-from-sdist	15m 51s
build-and-test (ubuntu-20.04, 3.8)	2m 44s
build-and-test (ubuntu-20.04, 3.9)	2m 53s
build-and-test (ubuntu-20.04, 3.10)	2m 54s
build-and-test (ubuntu-20.04, 3.11)	3m 50s
build-and-test (ubuntu-20.04, 3.12)	2m 58s
build-and-test (macos-12, 3.8)	4m 7s
build-and-test (macos-12, 3.9)	4m 53s
build-and-test (macos-12, 3.10)	4m 52s
build-and-test (macos-12, 3.11)	4m 56s
build-and-test (macos-12, 3.12)	4m 12s
build-and-test (macos-14, 3.8)	3m 13s
build-and-test (macos-14, 3.9)	2m 34s
build-and-test (macos-14, 3.10)	2m 56s
build-and-test (macos-14, 3.11)	2m 40s
build-and-test (macos-14, 3.12)	2m 44s
build-and-test (windows-2022, 3.8)	5m 51s
build-and-test (windows-2022, 3.9)	8m 34s
build-and-test (windows-2022, 3.10)	8m 48s
build-and-test (windows-2022, 3.11)	9m 6s
build-and-test (windows-2022, 3.12)	7m 4s
build-and-test (pi, 3.8)	1m 36s
build-and-test (pi, 3.9)	1m 34s
build-and-test (pi, 3.10)	1m 35s
build-and-test (pi, 3.11)	1m 33s
build-and-test (pi, 3.12)	1m 35s
publish	0s
publish-archive	0s
publish-nightly	0s
	1h 56m 45s

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