[Device Posture] Remove folded-over status

At TPAC 2022, we have decided to remove 'folded-over' status
due to the platform API limitations.

Below is the resolution sentence from the meeting minutes of
the devices and sensors working group meeting.

https://www.w3.org/2022/09/15-dap-minutes.html#t16
RESOLUTION: Remove "Folded Over" posture from Device Posture API
            due to platform API limitations

Bug: 1066842
Change-Id: Iaa15b5cd871e44cd63a6eeda2ceb1f4e949788c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3912922
Reviewed-by: Rune Lillesveen <futhark@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Charlie Reis <creis@chromium.org>
Commit-Queue: Dongwoo Joshua Im <dw.im@samsung.com>
Cr-Commit-Position: refs/heads/main@{#1050951}
diff --git a/interfaces/device-posture.idl b/interfaces/device-posture.idl
index ba8f9f5..75d6a45 100644
--- a/interfaces/device-posture.idl
+++ b/interfaces/device-posture.idl
@@ -17,5 +17,4 @@
 enum DevicePostureType {
   "continuous",
   "folded",
-  "folded-over"
 };