core: delete entity models #3671

Job	Run time
dojo-core-test	4m 14s
dojo-defi-test	6m 6s
docs	2m 10s
clippy	2m 22s
dojo-erc-test	14m 13s
dojo-primitive-test	4m 20s
dojo-spawn-and-move-example-test	3m 34s
ensure-wasm	40s
ensure-windows	3m 23s
fmt	28s
test-hurl	1m 25s
test	14m 19s
	57m 14s

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