Revert "Add README with details about the status of support for ..." am: d807ea67bb am: de204a5509

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Car/Notification/+/3344336

Change-Id: Ie6a6fd19c658f491866e9c075412ead5f563d153
Signed-off-by: Automerger Merge Worker <[email protected]>