docs(attribute-directives): remove "the the"

Author: wardbell

public/docs/ts/latest/guide/attribute-directives.jade

@@ -140,7 +140,7 @@ figure.image-display
   :marked
     ### Your directive isn't working?
 
-    Did you remember to add the directive to the the `declarations` attribute of `@NgModule`? It is easy to forget!
+    Did you remember to add the directive to the `declarations` attribute of `@NgModule`? It is easy to forget!
     Open the console in the browser tools and look for an error like this:
   code-example(format="nocode").
     EXCEPTION: Template parse errors: