message: docs: remove duplicate entry in changelog for 8.2.6
diff: @@ -54,6 +54,8 @@ This should impact very few users and the user's that are impacted have a very e
  <a name="8.2.6"></a>
  ## [8.2.6](https://github.com/angular/angular/compare/8.2.5...8.2.6) (2019-09-11)
  +This release contains various API docs improvements.
  +
  <a name="9.0.0-next.5"></a>
  @@ -117,13 +119,6 @@ deprecated implementation.
  -<a name="8.2.6"></a>
  -## [8.2.6](https://github.com/angular/angular/compare/8.2.5...8.2.6) (2019-09-11)
  -
  -This release contains various API docs improvements.
  -
  -
  -
  <a name="8.2.5"></a>
  ## [8.2.5](https://github.com/angular/angular/compare/8.2.4...8.2.5) (2019-09-04)
  