automake: remove unused stuff from Makefile.legacy

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>

Makefile.legacy

@@ -14,20 +14,6 @@ ifeq ($(strip $(foreach var,clean,$(findstring $(var),$(MAKECMDGOALS)))),)
  endif
 endif
 
-ifneq (,$(findstring ppc,$(UNAME_M)))
-CFLAGS+=-fsigned-char
-endif
-ifneq (,$(findstring x86_64,$(UNAME_M)))
-CFLAGS+=-m64
-endif
-
-ROOT_PREFIX=
-
-# extra cflags to build dependencies. Recursively expanded.
-MAKE_DEPS= -MD -MT $@ -MF .$(subst /,_,$@).d -MP
-
-CFLAGS+=$(DAHDI_INCLUDE)
-
 CHKCONFIG	:= $(wildcard /sbin/chkconfig)
 UPDATE_RCD	:= $(wildcard /usr/sbin/update-rc.d)
 ifeq (,$(DESTDIR))