minor clean-up. SurfaceFlinger doesn't need libpixelflinger.so.

Change-Id: I3bdca74351c8e480a05084bc412a96c5f685221d
diff --git a/include/surfaceflinger/Surface.h b/include/surfaceflinger/Surface.h
index cef439c..2df8ca3 100644
--- a/include/surfaceflinger/Surface.h
+++ b/include/surfaceflinger/Surface.h
@@ -249,7 +249,7 @@
             uint32_t *pWidth, uint32_t *pHeight,
             uint32_t *pFormat, uint32_t *pUsage) const;
 
-    static void cleanCachedSurfaces();
+    static void cleanCachedSurfacesLocked();
 
     class BufferInfo {
         uint32_t mWidth;