Remove unnused class

Author: egregius313

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

@@ -7,13 +7,6 @@ private import semmle.code.java.dataflow.TaintTracking
 private import semmle.code.java.dataflow.ExternalFlow
 private import semmle.code.java.security.RandomQuery
 
-/**
- * The `java.util.Random` class.
- */
-class TypeRandom extends RefType {
-  TypeRandom() { this.hasQualifiedName("java.util", "Random") }
-}
-
 /**
  * A node representing a source of weak randomness.
  *