slot_rep: =delete copy and move operations.
slot_rep: =delete copy and move operations.

Prevent, copy and move constructors and assignment operators from
being generated automatically. These are never used, but this
will make sure of that.
See https://bugzilla.gnome.org/show_bug.cgi?id=756484#c5

Distrotech/libsigcxx2,Distrotech/libsigcxx2,Distrotech/libsigcxx2