This indicates a fundemental misunderstanding of OpenGL ES. It cannot break working code by not having OpenGL 1.0 features, because OpenGL ES is not a revision to or successor of OpenGL 1.0.
Note that OpenGL 4, which is a (distant) successor to OpenGL 1, does include OpenGL 1s features, marked as deprecated.
Note that OpenGL 4, which is a (distant) successor to OpenGL 1, does include OpenGL 1s features, marked as deprecated.