Revert "Update AIDL IVibrator manifest version to 2."

Revert submission 1540633

Reason for revert: AOSP not updated yet
Reverted Changes:
I418cd4fc5:Update AIDL IVibrator manifest version to 2.
I08b4b189d:matrix: IVibrator AIDL has version 2.

Change-Id: I1cc5ab201e079a09c4db2667207c856ff56b0988
diff --git a/vibrator/aidl/default/vibrator-default.xml b/vibrator/aidl/default/vibrator-default.xml
index 4db8f8c..49b11ec 100644
--- a/vibrator/aidl/default/vibrator-default.xml
+++ b/vibrator/aidl/default/vibrator-default.xml
@@ -1,7 +1,6 @@
 <manifest version="1.0" type="device">
     <hal format="aidl">
         <name>android.hardware.vibrator</name>
-        <version>2</version>
         <fqname>IVibrator/default</fqname>
     </hal>
 </manifest>