Python: Remove unused getTornadoRequestHandlerMethod

It was only used in a test, and with the mock, it gives no results anyway.

python/ql/src/semmle/python/web/tornado/Tornado.qll

@@ -11,10 +11,6 @@ ClassObject aTornadoRequestHandlerClass() {
     result.getASuperType() = theTornadoRequestHandlerClass()
 }
 
-FunctionObject getTornadoRequestHandlerMethod(string name) {
-    result = theTornadoRequestHandlerClass().declaredAttribute(name)
-}
-
 /** Holds if `node` is likely to refer to an instance of a tornado 
  * `RequestHandler` class.
  */

python/ql/test/library-tests/web/tornado/Methods.ql

@@ -1,12 +0,0 @@
-
-import python
-
-import semmle.python.TestUtils
-
-import semmle.python.web.tornado.Tornado
-
-from FunctionObject func, string name
-where func = getTornadoRequestHandlerMethod(name) and
-/* Compatibility hack to make tests pass on both 1.20 and 1.21 */
-not name = "_execute"
-select name, func.toString(), remove_library_prefix(func.getFunction().getLocation())