Shaders: remove unecessary Utilities.ConvertTexCoord()

Author: xen2

sources/engine/Stride.Rendering/Rendering/Utils/Utilities.sdsl

@@ -44,9 +44,4 @@ shader Utilities
     {
         return specularColor + (max(specularColor, gloss) - specularColor) * pow(1.0f - saturate(dot(eye, h)), 5.0f) * factor;
     }
-
-    // flip the texture coordinate if on an opengl device (since OpenGL is not supported anymore, do nothing)
-    static float2 ConvertTexCoord(float2 texcoord) {
-        return texcoord;
-    }
 };