PR modula2/110284 Remove stor-layout.o and backend header files

PR modula2/110284 Remove stor-layout.o and backend header files

This patch removes stor-layout.o from the front end and also removes
back end header files from gcc-consolidation.h.

gcc/m2/ChangeLog:

	PR modula2/110284
	* Make-lang.in (m2_OBJS): Assign $(GM2_C_OBJS).
	(GM2_C_OBJS): Remove m2/stor-layout.o.
	(m2/stor-layout.o): Remove rule.
	* gm2-gcc/gcc-consolidation.h (rtl.h): Remove include.
	(df.h): Remove include.
	(except.h): Remove include.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>