Remove IGraphicBufferProducer include.

We have removed references of IGraphicBufferProducer outside of libgui
so this include is no longer necessary. More information at
go/warren-buffers.

Bug: 342197851
Test: build and run
Flag: com.android.graphics.libgui.flags.wb_libcameraservice
Change-Id: Idebeb2d1c74cef0297aa49bd0eb0704084aee4aa
diff --git a/camera/Camera.cpp b/camera/Camera.cpp
index 0bc735f..1da4fa6 100644
--- a/camera/Camera.cpp
+++ b/camera/Camera.cpp
@@ -26,8 +26,6 @@
 #include <Camera.h>
 #include <android/hardware/ICameraService.h>
 #include <android/hardware/ICamera.h>
-
-#include <gui/IGraphicBufferProducer.h>
 #include <gui/Surface.h>
 
 namespace android {