Revert "Add plugin API to use cas@1.1 new interface"

This reverts commit d5dda38886699b8383f7ce38f7d254b14a18dec3.

Reason for revert: <INSERT REASONING HERE>

Change-Id: I7e4abd8e9e5e21abda3ec13e5764d9155e634ec7
diff --git a/headers/media_plugin/media/cas/CasAPI.h b/headers/media_plugin/media/cas/CasAPI.h
index c87ee56..4de314d 100644
--- a/headers/media_plugin/media/cas/CasAPI.h
+++ b/headers/media_plugin/media/cas/CasAPI.h
@@ -48,14 +48,6 @@
         uint8_t *data,
         size_t size);
 
-typedef void (*CasPluginCallbackExt)(
-        void *appData,
-        int32_t event,
-        int32_t arg,
-        uint8_t *data,
-        size_t size,
-        const CasSessionId *sessionId);
-
 struct CasFactory {
     CasFactory() {}
     virtual ~CasFactory() {}
@@ -75,13 +67,6 @@
             CasPluginCallback callback,
             CasPlugin **plugin) = 0;
 
-    // Construct a new extend instance of a CasPlugin given a CA_system_id
-    virtual status_t createPlugin(
-            int32_t CA_system_id,
-            void *appData,
-            CasPluginCallbackExt callback,
-            CasPlugin **plugin) = 0;
-
 private:
     CasFactory(const CasFactory &);
     CasFactory &operator=(const CasFactory &); /* NOLINT */
@@ -125,15 +110,7 @@
             int32_t arg,
             const CasData &eventData) = 0;
 
-    // Deliver an session event to the CasPlugin. The format of the event is
-    // specific to the CA scheme and is opaque to the framework.
-    virtual status_t sendSessionEvent(
-            const CasSessionId &sessionId,
-            int32_t event,
-            int32_t arg,
-            const CasData &eventData) = 0;
-
-   // Native implementation of the MediaCas Java API provision method.
+    // Native implementation of the MediaCas Java API provision method.
     virtual status_t provision(
             const String8 &provisionString) = 0;