Delete bors.toml in favor of GitHub merge queues #2748

Job	Run time
geo-postgis (georust/geo-ci:proj-9.2.1-rust-1.63)	3m 16s
geo-postgis (georust/geo-ci:proj-9.2.1-rust-1.69)	2m 32s
geo-postgis (georust/geo-ci:proj-9.2.1-rust-1.70)	50s
geo-fuzz (georust/geo-ci:proj-9.2.1-rust-1.70)	1m 13s
geo-types (georust/geo-ci:proj-9.2.1-rust-1.63)	3m 6s
geo-types (georust/geo-ci:proj-9.2.1-rust-1.69)	3m 3s
geo-types (georust/geo-ci:proj-9.2.1-rust-1.70)	1m 18s
geo (georust/geo-ci:proj-9.2.1-rust-1.63)	2m 57s
geo (georust/geo-ci:proj-9.2.1-rust-1.69)	2m 57s
geo (georust/geo-ci:proj-9.2.1-rust-1.70)	2m 51s
lint (georust/geo-ci:proj-9.2.1-rust-1.70)	2m 1s
bench	4m 57s
ci result	1s
ci result	0s
	31m 2s

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