SkDebugCanvas: remove unused <iostream> include.

src/utils/debugger/SkDebugCanvas.cpp

Index: src/utils/debugger/SkDebugCanvas.cpp
diff --git a/src/utils/debugger/SkDebugCanvas.cpp b/src/utils/debugger/SkDebugCanvas.cpp
index f87a06aa949d9950719b7e609d90ac85c29d23fb..c6fcb07b8c46ba5106d14ec38588f030fd127dca 100644
--- a/src/utils/debugger/SkDebugCanvas.cpp
+++ b/src/utils/debugger/SkDebugCanvas.cpp
@@ -14,17 +14,6 @@
 #include "SkDevice.h"
 #include "SkXfermode.h"
 
-#ifdef SK_BUILD_FOR_WIN
-    // iostream includes xlocale which generates warning 4530 because we're compiling without
-    // exceptions
-    #pragma warning(push)
-    #pragma warning(disable : 4530)
-#endif
-#include <iostream>
-#ifdef SK_BUILD_FOR_WIN
-    #pragma warning(pop)
-#endif
-
 static SkBitmap make_noconfig_bm(int width, int height) {
     SkBitmap bm;
     bm.setConfig(SkBitmap::kNo_Config, width, height);