Require a type between 'new' and '{ ... }'

It seems we're simply not using the 'new { ... }' form in
practice.

Addresses #179, but also relevant for #144.

lib/_007/Parser/Syntax.pm

@@ -223,7 +223,7 @@ grammar _007::Parser::Syntax {
     }
     token term:object {
         [new» <.ws>
-            [<identifier> <?{ $*runtime.maybe-get-var(~$<identifier>) ~~ Val::Type }> <.ws>]?
+            <identifier> <?{ $*runtime.maybe-get-var(~$<identifier>) ~~ Val::Type }> <.ws>
         ]?
         '{' ~ '}' <propertylist>
     }

t/features/objects.t

@@ -225,20 +225,6 @@ use _007::Test;
     parses-to $program, $ast, "a `return` inside of a (short-form) method is fine";
 }
 
-{
-    my $program = q:to/./;
-        my o1 = { name: "James" };
-        my o2 = new { name: "James" };
-
-        say(o1 == o2);
-        .
-
-    outputs
-        $program,
-        qq[True\n],
-        "`new` on object literals without the type is allowed but optional";
-}
-
 {
     my $program = q:to/./;
         f();