egl: Remove a bogus restriction from eglMakeCurrent

The comment here is from the EGL_MESA_configless_context era, and maybe
that was true, but EGL_KHR_no_config_context has no such restriction.
The only restriction is that both surfaces be compatible with the
context, but a no-config context is defined to be compatible with any
surface.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18824>

src/egl/main/eglcontext.c

@@ -785,11 +785,6 @@ _eglCheckMakeCurrent(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read)
       /* Otherwise we must be using the EGL_KHR_no_config_context
        * extension */
       assert(disp->Extensions.KHR_no_config_context);
-
-      /* The extension doesn't permit binding draw and read buffers with
-       * differing contexts */
-      if (draw && read && draw->Config != read->Config)
-         return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
    }
 
    return EGL_TRUE;