remove dependency on perl to rotate the build number. this target should

have only been defined if MOZILLA_OFFICIAL was set, but it didn't work
right at all.

i've commented out the offending lines for now, until it is determined how we go
about rolling version numbers in the new world.

config/makefile.win

@@ -59,13 +59,13 @@ mantomak.exe:: mantomak.c
 bin2rc.exe:: bin2rc.c
     $(CC) -O2 -MD bin2rc.c
 
-export:: makecopy.exe mangle.exe mantomak.exe bin2rc.exe $(DEPTH)/build/build_number
+export:: makecopy.exe mangle.exe mantomak.exe bin2rc.exe
 
 #update build number from within make script
-$(DEPTH)/build/build_number:: FORCE
-        $(RM) $@
-        $(PERL) bdate.pl > $@
-        $(PERL) aboutime.pl $(DEPTH)/l10n/us/xp/about-all.html $@
+#    $(DEPTH)/build/build_number:: FORCE
+#        $(RM) $@
+#        $(PERL) bdate.pl > $@
+#        $(PERL) aboutime.pl $(DEPTH)/l10n/us/xp/about-all.html $@
 
 install:: export