Delete unused args

Bug: 21170575
Change-Id: Icc832f70f206342557f44667ad3498405d04db78
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index edf214b..2180976 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -155,8 +155,7 @@
     }
 }
 
-// TODO: don't pass viewport size, it's automatic via EGL
-void CanvasContext::setup(int width, int height, float lightRadius,
+void CanvasContext::setup(float lightRadius,
         uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha) {
 #if HWUI_NEW_OPS
     mLightGeometry.radius = lightRadius;