Remove connector close workaround for older Python versions #8057

Job	Run time
Linter	1m 30s
Generate llhttp sources	8s
Benchmark	2m 38s
Test (3.9, ubuntu, false)	1s
Test (3.9, macos, false)	1s
Test (3.9, windows, false)	49s
Test (3.9, Y, ubuntu, false)	1s
Test (3.10, ubuntu, false)	3m 3s
Test (3.10, macos, false)	2m 40s
Test (3.10, windows, false)	3m 10s
Test (3.10, Y, ubuntu, false)	2m 33s
Test (3.11, ubuntu, false)	1m 57s
Test (3.11, macos, false)	2m 1s
Test (3.11, windows, false)	2m 19s
Test (3.11, Y, ubuntu, false)	1m 47s
Test (3.12, ubuntu, false)	1m 28s
Test (3.12, macos, false)	1m 34s
Test (3.12, windows, false)	1m 14s
Test (3.12, Y, ubuntu, false)	56s
Test (3.13, ubuntu, false)	28s
Test (3.13, macos, false)	58s
Test (3.13, windows, false)	43s
Test (3.13, Y, ubuntu, false)	1s
Test (pypy-3.9, Y, ubuntu, false)	1s
Test (ubuntu, 3.14, true, Y)	1s
check	2s
Pre-Deploy	0s
Tarball	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Deploy	0s
	32m 4s

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