Clean unused parameters, disable warnings

Change-Id: Iddb872f53075dd022eeef45265594d1c6a9e2bc0
diff --git a/libs/hwui/GradientCache.h b/libs/hwui/GradientCache.h
index 43934d9..6a783b1 100644
--- a/libs/hwui/GradientCache.h
+++ b/libs/hwui/GradientCache.h
@@ -151,7 +151,7 @@
     Texture* addLinearGradient(GradientCacheEntry& gradient,
             uint32_t* colors, float* positions, int count);
 
-    void generateTexture(uint32_t* colors, float* positions, int count, Texture* texture);
+    void generateTexture(uint32_t* colors, float* positions, Texture* texture);
 
     struct GradientInfo {
         uint32_t width;