Align files with new naming pattern

Author: Benjamin Muskalla

java/ql/lib/semmle/code/java/dataflow/ExternalFlow.qll

@@ -86,7 +86,6 @@ private module Frameworks {
   private import semmle.code.java.frameworks.ApacheHttp
   private import semmle.code.java.frameworks.apache.Collections
   private import semmle.code.java.frameworks.apache.IO
-  private import semmle.code.java.frameworks.apache.IOCustom
   private import semmle.code.java.frameworks.apache.Lang
   private import semmle.code.java.frameworks.Flexjson
   private import semmle.code.java.frameworks.guava.Guava