(Camera)ProCamera: Remove unused functions from binder interface

Change-Id: I0582268cef6e84b630bc87c8a03dcd69d54c440d
diff --git a/include/camera/IProCameraUser.h b/include/camera/IProCameraUser.h
index 7bddb0c..45b818c 100644
--- a/include/camera/IProCameraUser.h
+++ b/include/camera/IProCameraUser.h
@@ -61,8 +61,7 @@
                                           bool streaming = false) = 0;
     virtual status_t        cancelRequest(int requestId) = 0;
 
-    virtual status_t        requestStream(int streamId) = 0;
-    virtual status_t        cancelStream(int streamId) = 0;
+    virtual status_t        deleteStream(int streamId) = 0;
     virtual status_t        createStream(
                                       int width, int height, int format,
                                       const sp<IGraphicBufferProducer>& bufferProducer,