Revert "Extend EVS interfaces and data types"

This reverts commit e6976fce80a9a0951c6bc6f668b2de032ccc4d34.
diff --git a/automotive/evs/1.1/default/service.cpp b/automotive/evs/1.1/default/service.cpp
index 5135864..128a14a 100644
--- a/automotive/evs/1.1/default/service.cpp
+++ b/automotive/evs/1.1/default/service.cpp
@@ -33,7 +33,7 @@
 using android::hardware::joinRpcThreadpool;
 
 // Generated HIDL files
-using android::hardware::automotive::evs::V1_1::IEvsEnumerator;
+using android::hardware::automotive::evs::V1_0::IEvsEnumerator;
 using android::hardware::automotive::evs::V1_0::IEvsDisplay;
 
 // The namespace in which all our implementation code lives