hoon: don't nest check in zpmc

This check required the new type of +type to nest within the old type of
+type, which is wrong.  Specifically, this disallowed adding new runes
without a staging procedure (which we didn't successfully complete).

bin/solid.pill

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:4c7a2c5c36de2a929de2bddc34a1b315a348e0f4ae338da17d817c1d890b161a
-size 16396085
+oid sha256:447868a553c636c2b46c1d3cd2f48def1f66050976fb2ea03775443bdb591aae
+size 16468208

pkg/arvo/sys/hoon.hoon

@@ -10300,7 +10300,6 @@
         {$zpmc *}
       =+  vos=$(gol %noun, gen q.gen)
       =+  ref=p:$(gol %noun, gen p.gen)
-      ?>  (~(nest ut p:!>(*type)) & ref)
       [(nice (cell ref p.vos)) (cons [%1 burp(sut p.vos)] q.vos)]
     ::
         {$zpts *}   [(nice %noun) [%1 q:$(vet |, gen p.gen)]]