Java: remove redundant imports

Author: Jami Cogswell

java/ql/lib/semmle/code/java/security/UrlForward.qll

@@ -5,7 +5,6 @@ private import semmle.code.java.dataflow.ExternalFlow
 private import semmle.code.java.dataflow.FlowSources
 private import semmle.code.java.dataflow.StringPrefixes
 private import semmle.code.java.security.PathSanitizer
-private import semmle.code.java.dataflow.DataFlow
 private import semmle.code.java.controlflow.Guards
 
 /** A URL forward sink. */

java/ql/lib/semmle/code/java/security/UrlForwardQuery.qll

@@ -3,7 +3,6 @@
 import java
 import semmle.code.java.security.UrlForward
 import semmle.code.java.dataflow.FlowSources
-import semmle.code.java.dataflow.TaintTracking
 import semmle.code.java.security.PathSanitizer
 
 /**