JS: Remove tautological SourceNode::Range subclasses

Author: asgerf

javascript/ql/src/semmle/javascript/frameworks/HTTP.qll

@@ -467,10 +467,6 @@ module HTTP {
     abstract DataFlow::Node getASecretKey();
   }
 
-  private class CookieMiddlewareInstanceAsSourceNode extends DataFlow::SourceNode::Range {
-    CookieMiddlewareInstanceAsSourceNode() { this instanceof CookieMiddlewareInstance }
-  }
-
   /**
    * A key used for signed cookies, viewed as a `CryptographicKey`.
    */

javascript/ql/src/semmle/javascript/frameworks/LodashUnderscore.qll

@@ -14,10 +14,6 @@ module LodashUnderscore {
     abstract string getName();
   }
 
-  private class MemberAsSourceNode extends DataFlow::SourceNode::Range {
-    MemberAsSourceNode() { this instanceof Member }
-  }
-
   /**
    * An import of `lodash` or `underscore` accessing a given member of that package.
    */