Deletes deprecated field and updates comment for data source url. #11720

Job	Run time
lint-misc	11s
build-data-server-pip (native, ubuntu-20.04, 1.65.0)	1m 12s
lint-frontend	1m 16s
lint-python-flake8 (3.9)	12s
build-data-server-pip (native, macos-13, 1.65.0)	2m 14s
lint-python-flake8 (3.10)	16s
build-data-server-pip (universal, ubuntu-20.04, 1.65.0)	9s
lint-python-yaml-docs	24s
lint-python-flake8 (3.11)	10s
lint-rust (1.65.0, 0.16.1)	31s
build (tf, 3.9)	33m 50s
build (notf, 3.9)	29m 42s
	1h 10m 7s

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