Avoid return where not required

modules/exploits/unix/webapp/drupal_restws_exec.rb

@@ -63,9 +63,10 @@ class MetasploitModule < Msf::Exploit::Remote
       }
     )
     if res && res.body.include?(r)
-      return Exploit::CheckCode::Vulnerable
+      Exploit::CheckCode::Vulnerable
+    else
+      Exploit::CheckCode::Safe
     end
-    return Exploit::CheckCode::Safe
   end
 
   def exploit