4028 remove CLOSED_IS_PRESENT

*** 128,138 ****
  
  clean clobber: $(SUBDIRS) head pkg
  
  closedbins: bldtools $(ROOTDIRS) FRC
          @CLOSED_ROOT="$$ON_CLOSED_BINS/root_$(MACH)$${RELEASE_BUILD+-nd}"; \
-         if [ "$$CLOSED_IS_PRESENT" = no ]; then \
                  if [ ! -d "$$CLOSED_ROOT" ]; then \
                          $(ECHO) "Error: ON_CLOSED_BINS must point to closed" \
                              "binaries."; \
                          $(ECHO) "root_$(MACH)$${RELEASE_BUILD+-nd} is not" \
                              "present in $$ON_CLOSED_BINS."; \
--- 128,137 ----
*** 142,153 ****
                  (cd $$CLOSED_ROOT; \
                      $(TAR) cfX - $(CODEMGR_WS)/exception_lists/closed-bins .) | \
                      (cd $(ROOT); $(TAR) xBpf -); \
                  ( cd $(ROOT); $(CTFSTRIP) $$(cd $$CLOSED_ROOT; $(FIND) \
                      ./kernel ./usr/kernel ./platform/*/kernel -type f -a -perm -u+x | \
!                     $(EGREP) -vf $(CODEMGR_WS)/exception_lists/closed-bins) ); \
!         fi
  
  #
  # Declare what parts can be built in parallel
  # DUMMY at the end is used in case macro expansion produces an empty string to
  # prevent everything going in parallel
--- 141,151 ----
          (cd $$CLOSED_ROOT; \
              $(TAR) cfX - $(CODEMGR_WS)/exception_lists/closed-bins .) | \
              (cd $(ROOT); $(TAR) xBpf -); \
          ( cd $(ROOT); $(CTFSTRIP) $$(cd $$CLOSED_ROOT; $(FIND) \
              ./kernel ./usr/kernel ./platform/*/kernel -type f -a -perm -u+x | \
!             $(EGREP) -vf $(CODEMGR_WS)/exception_lists/closed-bins) )
  
  #
  # Declare what parts can be built in parallel
  # DUMMY at the end is used in case macro expansion produces an empty string to
  # prevent everything going in parallel