cp-tree.h, decl2.c: Remove support for -fall-virtual, -fenum-int-equivalence and...

cp-tree.h, decl2.c: Remove support for -fall-virtual, -fenum-int-equivalence and -fno-nonnull-objects.

	* cp-tree.h, decl2.c: Remove support for -fall-virtual,
	-fenum-int-equivalence and -fno-nonnull-objects.
	* class.c (check_for_override): Remove support for -fall-virtual.
	(finish_struct_1): Likewise.
	* call.c (build_new_op): Remove support for -fenum-int-equivalence.
	* typeck.c (build_binary_op_nodefault): Likewise.
	* cvt.c (ocp_convert): Likewise.
	* call.c (build_vfield_ref): Remove support for -fno-nonnull-objects.
	* class.c (build_vbase_path): Likewise.

From-SVN: r22131