Moved SortTaintStep to more appropriate home TaintTracking->Arrays

javascript/ql/lib/semmle/javascript/Arrays.qll

@@ -444,4 +444,17 @@ private module ArrayLibraries {
       )
     }
   }
+
+  /**
+   * A taint propagating data flow edge arising from sorting.
+   */
+  private class SortTaintStep extends TaintTracking::SharedTaintStep {
+    override predicate heapStep(DataFlow::Node pred, DataFlow::Node succ) {
+      exists(DataFlow::MethodCallNode call |
+        call.getMethodName() = "sort" and
+        pred = call.getReceiver() and
+        succ = call
+      )
+    }
+  }
 }

javascript/ql/lib/semmle/javascript/dataflow/TaintTracking.qll

@@ -869,19 +869,6 @@ module TaintTracking {
     }
   }
 
-  /**
-   * A taint propagating data flow edge arising from sorting.
-   */
-  private class SortTaintStep extends SharedTaintStep {
-    override predicate heapStep(DataFlow::Node pred, DataFlow::Node succ) {
-      exists(DataFlow::MethodCallNode call |
-        call.getMethodName() = "sort" and
-        pred = call.getReceiver() and
-        succ = call
-      )
-    }
-  }
-
   /**
    * A taint step through an exception constructor, such as `x` to `new Error(x)`.
    */