Apply suggestion from @hvitved

Co-authored-by: Tom Hvitved <hvitved@github.com>

Author: michaelnebel

csharp/ql/lib/Linq/Helpers.qll

@@ -122,7 +122,7 @@ private predicate acceptableForLinqCapture(Expr e) {
     p = pa.getTarget() and
     pa = e.getAChildExpr*()
   |
-    (p.isOutOrRef() or p.isIn() or p.isReadonlyRef())
+    p.isOutOrRef() or p.isIn() or p.isReadonlyRef()
   )
 }