Fix ending line error

Author: luchua-bc

java/ql/src/experimental/Security/CWE/CWE-548/InsecureDirectoryConfig.ql

@@ -40,4 +40,3 @@ class DirectoryListingInitParam extends WebXMLElement {
 from DirectoryListingInitParam initp
 where initp.isListingEnabled()
 select initp, "Directory listing should be disabled to mitigate filename and path disclosure"
-