Remove compat code for Python older than 3.8 from tests #847

Job	Run time
⚙️ Pre-set global build settings	1s
lint / Linter	1m 49s
📦 Build distribution packages	11s
Build wheels on macos / Build wheels on macos	4m 25s
Build wheels on windows / Build wheels on windows	5m 6s
Build wheels on ubuntu / Build wheels on ubuntu	2m 3s
Test (3.13, ubuntu)	28s
Test (3.13, macos)	39s
Test (3.13, windows)	1m 43s
Test (3.13, Y, ubuntu)	2m 26s
Test (3.12, ubuntu)	19s
Test (3.12, macos)	20s
Test (3.12, windows)	49s
Test (3.12, Y, ubuntu)	18s
Test (3.11, ubuntu)	26s
Test (3.11, macos)	19s
Test (3.11, windows)	52s
Test (3.11, Y, ubuntu)	24s
Test (3.10, ubuntu)	18s
Test (3.10, macos)	21s
Test (3.10, windows)	55s
Test (3.10, Y, ubuntu)	19s
Test (3.9, ubuntu)	20s
Test (3.9, macos)	22s
Test (3.9, windows)	42s
Test (3.9, Y, ubuntu)	16s
Test (3.8, ubuntu)	26s
Test (3.8, macos)	49s
Test (3.8, windows)	40s
Test (3.8, Y, ubuntu)	18s
Test (pypy-3.8, Y, ubuntu)	52s
Tests status	12s
Pre-Deploy	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Deploy	0s
	29m 28s

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