Do not announce platform repos as module dependencies #1648

Job	Run time
matrix-prep-bazelversion	3s
matrix-prep-os	1s
test (ubuntu-latest, 7.4.1, ., true)	37s
test (ubuntu-latest, 7.4.1, ., false)	23s
test (ubuntu-latest, 7.4.1, e2e/wasm, false)	34s
test (ubuntu-latest, 7.4.1, e2e/smoke, true)	13s
test (ubuntu-latest, 7.4.1, e2e/smoke, false)	12s
test (ubuntu-latest, 7.4.1, e2e/assertion, true)	3m 43s
test (ubuntu-latest, 6.4.0, ., true)	55s
test (ubuntu-latest, 6.4.0, ., false)	50s
test (ubuntu-latest, 6.4.0, e2e/wasm, false)	39s
test (ubuntu-latest, 6.4.0, e2e/smoke, true)	11s
test (ubuntu-latest, 6.4.0, e2e/smoke, false)	11s
test (ubuntu-latest, 6.4.0, e2e/assertion, true)	4m 3s
	12m 35s

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