Remove email address

Author: pawel-lewtak

.github/PULL_REQUEST_TEMPLATE.md

@@ -28,8 +28,6 @@ Make sure all of these items are complete, or else the PR will be ineligible for
 - [ ] All code, branch, and git naming and style conventions are followed (see [`CONTRIBUTING.md`](https://github.com/sendgrid/php-http-client/blob/master/CONTRIBUTING.md#style-guidelines-and-naming-conventions))
 - [ ] Feature branch has been rebased off of the latest `master` branch. (see [`CONTRIBUTING.md`](https://github.com/sendgrid/php-http-client/blob/master/CONTRIBUTING.md#creating-a-pull-request)).
 
-If you have questions, please send an email [Sendgrid](mailto:dx@sendgrid.com), or file a Github Issue in this repository.
-
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