Remove WebGL 2 only statement

src/Engine/babylon.engine.ts

@@ -4028,7 +4028,6 @@
             gl.texParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_MIN_FILTER, filters.min);
             gl.texParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
             gl.texParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
-            gl.texParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_WRAP_R, gl.CLAMP_TO_EDGE);
 
             for (var face = 0; face < 6; face++) {
                 gl.texImage2D((gl.TEXTURE_CUBE_MAP_POSITIVE_X + face), 0, this._getRGBABufferInternalSizedFormat(fullOptions.type), size, size, 0, gl.RGBA, this._getWebGLTextureType(fullOptions.type), null);