bison: remove redundant HOST_M4_DEPENDENCIES

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/bison/bison.mk

@@ -16,7 +16,5 @@ endef
 
 BISON_POST_CONFIGURE_HOOKS += BISON_DISABLE_EXAMPLES
 
-HOST_BISON_DEPENDENCIES += host-m4
-
 $(eval $(call AUTOTARGETS))
 $(eval $(call AUTOTARGETS,host))