(Camera)ProCamera: Remove unused functions from binder interface

Change-Id: I0582268cef6e84b630bc87c8a03dcd69d54c440d
diff --git a/services/camera/libcameraservice/ProCamera2Client.h b/services/camera/libcameraservice/ProCamera2Client.h
index f69021e..1dec263 100644
--- a/services/camera/libcameraservice/ProCamera2Client.h
+++ b/services/camera/libcameraservice/ProCamera2Client.h
@@ -48,8 +48,7 @@
                                         bool streaming = false);
     virtual status_t      cancelRequest(int requestId);
 
-    virtual status_t      requestStream(int streamId);
-    virtual status_t      cancelStream(int streamId);
+    virtual status_t      deleteStream(int streamId);
 
     virtual status_t      createStream(
             int width,