docs: remove unused SMS config from schema #5038

Job	Run time
Generate SDKs	3m 30s
Run end-to-end tests (postgres)	44m 26s
Run tests and lints	30m 17s
Run end-to-end tests (cockroach)	44m 30s
Run Playwright end-to-end tests (postgres)	5m 54s
Run end-to-end tests (sqlite)	43m 12s
Run Playwright end-to-end tests (cockroach)	7m 4s
Run Playwright end-to-end tests (sqlite)	6m 1s
Run end-to-end tests (mysql)	44m 37s
Run Playwright end-to-end tests (mysql)	5m 56s
Build CLI docs	0s
Generate changelog	0s
Generate release	0s
Release SDKs	0s
Render version schema	0s
Draft newsletter	0s
Pending approval Slack notification	0s
Send newsletter	0s
	3h 55m 27s

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