Remove connector close workaround for older Python versions #8063

Job	Run time
Linter	1m 13s
Generate llhttp sources	7s
Benchmark	2m 25s
Test (3.9, ubuntu, false)	3m 40s
Test (3.9, macos, false)	3m 36s
Test (3.9, windows, false)	4m 53s
Test (3.9, Y, ubuntu, false)	4m 21s
Test (3.10, ubuntu, false)	3m 40s
Test (3.10, macos, false)	2m 36s
Test (3.10, windows, false)	4m 48s
Test (3.10, Y, ubuntu, false)	3m 59s
Test (3.11, ubuntu, false)	3m 26s
Test (3.11, macos, false)	3m 0s
Test (3.11, windows, false)	4m 20s
Test (3.11, Y, ubuntu, false)	3m 56s
Test (3.12, ubuntu, false)	3m 58s
Test (3.12, macos, false)	2m 47s
Test (3.12, windows, false)	4m 32s
Test (3.12, Y, ubuntu, false)	4m 7s
Test (3.13, ubuntu, false)	4m 0s
Test (3.13, macos, false)	3m 21s
Test (3.13, windows, false)	5m 2s
Test (3.13, Y, ubuntu, false)	4m 27s
Test (pypy-3.9, Y, ubuntu, false)	7m 23s
Test (ubuntu, 3.14, true, Y)	2m 39s
check	4s
Pre-Deploy	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Tarball	0s
Deploy	0s
	1h 32m 20s

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