Revert "Fix Hash.perl creating code that throws an error when EVALing"

This reverts commit 979d2d4.

${ } parses fine as long as you're actually producing a hash literal.

src/core/Hash.pm

@@ -44,8 +44,8 @@ my class Hash { # declared in BOOTSTRAP
     }
 
     multi method perl(Hash:D \SELF:) {
+        '$' x nqp::iscont(SELF) ~
         '{' ~ SELF.pairs.sort.map({.perl}).join(', ') ~ '}'
-        ~ '.item' x nqp::iscont(SELF)
     }
 
     multi method gist(Hash:D:) {