Remove labels from GH templates since we're disabling Apollo Bot (#1988)

Removing all mentions of labelling from this repos custom issue/PR templates (since we're no longer using Apollo Bot).

.github/ISSUE_TEMPLATE.md

@@ -1,30 +0,0 @@
-
-<!--**Issue Labels**
-
-While not necessary, you can help organize our issues by labeling this issue when you open it.  To add a label automatically, simply [x] mark the appropriate box below:
-
-- [ ] has-reproduction
-
-   > Check this box if you're able to include a small, functioning
-   > reproduction (preferably as a cloneable project).  To increase
-   > the chances of finding a resolution, we highly recommend including a reproduction!
-   
-- [ ] feature
-
-   > Be sure to search for existing feature requests before opening
-   > new feature requests!  Include as much detail about what is needed
-   > and some example use cases, please!
-   
-- [ ] docs
-
-   > Documentation issues should be labeled, but if you know the answer
-   > please consider submitting a Pull Request instead.  (The documentation
-   > lives in the `docs/source` directory of this repository.)
-
-- [ ] blocking
-
-   > If you're unable to go to production because of a bug, please check
-   > this box.  If it's a feature request, we suggest that you avoid checking
-   > this box and instead follow the instructions for feature requests above.
-   
--->

.github/PULL_REQUEST_TEMPLATE.md

@@ -12,13 +12,3 @@ TODO:
 * [ ] Rebase your changes on master so that they can be merged easily
 * [ ] Make sure all tests and linter rules pass
 
-<!--**Pull Request Labels**
-
-While not necessary, you can help organize our pull requests by labeling this issue when you open it.  To add a label automatically, simply [x] mark the appropriate box below:
-
-- [ ] feature
-- [ ] blocking
-- [ ] docs
-
-To add a label not listed above, simply place `/label another-label-name` on a line by itself.
--->