perf(token): Allow optimizer remove branch

Not entirely clear if its needed in this case but I generally have found
that these const conditionals seem to provide more optimized results.

I did a `rg is_partial_support -A 4` to see if any others had this
problem and this seemed to be isolated.

Fixes #404

src/token/mod.rs

@@ -52,7 +52,7 @@ where
         if <I as StreamIsPartial>::is_partial_supported() {
             any_::<_, _, true>(input)
         } else {
-            any_::<_, _, true>(input)
+            any_::<_, _, false>(input)
         }
     })
     .parse_next(input)