Remove partial clone instructions from playground setup
Remove partial clone instructions from playground setup

Test: N/A doc change only
Change-Id: Idb1f6dd5c8fbc00988f89dd271dc2163780c4477

androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx