Removed fake_a variable.

3rdparty/stb_image/stb_image.c

@@ -3000,7 +3000,6 @@ static stbi_uc *bmp_load(stbi *s, int *x, int *y, int *comp, int req_comp)
                   mg = 0xffu <<  8;
                   mb = 0xffu <<  0;
                   ma = 0xffu << 24;
-                  fake_a = 1; // @TODO: check for cases like alpha value is all 0 and switch it to 255
                } else {
                   mr = 31u << 10;
                   mg = 31u <<  5;