Removing obsolete call to start home activity with shell transitions am: 2b3dc6f730 am: d6091ac2d7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/24156953

Change-Id: I2a4c7683a2aa80c9c151943b8abc3af76b87261d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>