Removed love.graphics.setColorMode

- The "replace" color mode can easily be duplicated with love.graphics.setColor(255, 255, 255)
- The current color mode has no effect when a shader is active
- Color mode functionality can easily be replicated with shaders
- OpenGL ES 2 (iOS, Android, etc) does not have the functions used by love.graphics.setColorMode

src/modules/graphics/opengl/wrap_Graphics.h

@@ -71,10 +71,8 @@ int w_getBackgroundColor(lua_State *L);
 int w_setFont(lua_State *L);
 int w_getFont(lua_State *L);
 int w_setBlendMode(lua_State *L);
-int w_setColorMode(lua_State *L);
 int w_setDefaultImageFilter(lua_State *L);
 int w_getBlendMode(lua_State *L);
-int w_getColorMode(lua_State *L);
 int w_getDefaultImageFilter(lua_State *L);
 int w_setLineWidth(lua_State *L);
 int w_setLineStyle(lua_State *L);