API Remove GraphQL #450

Job	Run time
CI / Generate matrix	20s
CI / Context	1s
CI / Check governance	1s
CI / 8.3 prf-low mysql57 phpunit all	3m 11s
CI / 8.3 mariadb phpunit all	3m 34s
CI / 8.3 mysql57 phplinting	2m 26s
CI / 8.3 mysql57 endtoend root job1	9m 24s
CI / 8.3 mysql80 endtoend root job1	10m 54s
CI / 8.3 mysql57 endtoend root job2	18m 40s
CI / 8.3 mysql80 endtoend root job2	18m 41s
CI / 8.3 mysql57 endtoend root job3	7m 27s
CI / 8.3 mysql80 endtoend root job3	9m 10s
CI / 8.3 mysql57 js	4m 45s
CI / Dispatch tag patch release	0s
	1h 28m 34s

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