Remove the free disk space CI step. #2442

Job	Run time
Check GitHub Organization	1s
tox -e format-check,lint-check,typecheck,vendor-check,package	4m 36s
tox -e py312-pip23_3_2	23m 46s
./dtox.sh -e py27-pip20	11m 40s
tox -e py312-pip23_3_2-integration	1h 16m 8s
./dtox.sh -e py37-pip20	15m 27s
./dtox.sh -e py311-pip20	15m 14s
./dtox.sh -e py311-pip22_3_1	15m 22s
./dtox.sh -e py311-pip23_1_2	15m 2s
./dtox.sh -e py312-pip23_3_2	15m 0s
./dtox.sh -e py313-pip24_0	14m 33s
./dtox.sh -e pypy310-pip20	25m 32s
./dtox.sh -e pypy310-pip22_3_1	25m 5s
./dtox.sh -e pypy310-pip23_1_2	25m 40s
./dtox.sh -e py27-pip20-integration	20m 55s
./dtox.sh -e py37-pip22_3_1-integration	40m 54s
./dtox.sh -e py37-pip23_1_2-integration	40m 15s
./dtox.sh -e py311-pip20-integration	22m 24s
./dtox.sh -e py311-pip22_3_1-integration	27m 28s
./dtox.sh -e py311-pip23_1_2-integration	26m 57s
./dtox.sh -e py312-pip23_3_2-integration	36m 54s
./dtox.sh -e py313-pip24_0-integration	38m 37s
./dtox.sh -e pypy310-pip20-integration	43m 16s
./dtox.sh -e pypy310-pip22_3_1-integration	50m 28s
./dtox.sh -e pypy310-pip23_1_2-integration	50m 18s
Gather Final Status	1s
	11h 21m 33s

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