Remove stb_imagewrite.h reference.

src/dep.cpp

@@ -21,6 +21,3 @@
 #define NANOSVG_IMPLEMENTATION
 #define NANOSVG_ALL_COLOR_KEYWORDS
 #include <nanosvg.h>
-
-#define STB_IMAGE_WRITE_IMPLEMENTATION
-#include <stb_image_write.h>