docs: Modify README.md in alignment with SendGrid Support (sendgrid#459)

CONTRIBUTING.md

@@ -2,8 +2,6 @@ Hello! Thank you for choosing to help contribute to one of the Twilio SendGrid o
 
 All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.
 
-- [Feature Request](#feature-request)
-- [Submit a Bug Report](#submit-a-bug-report)
 - [Improvements to the Codebase](#improvements-to-the-codebase)
 - [Understanding the Code Base](#understanding-the-codebase)
 - [Testing](#testing)
@@ -13,33 +11,6 @@ All third-party contributors acknowledge that any contributions they provide wil
 
 There are a few ways to contribute, which we'll enumerate below:
 
-<a name="feature-request"></a>
-## Feature Request
-
-If you'd like to make a feature request, please read this section.
-
-The GitHub issue tracker is the preferred channel for library feature requests, but please respect the following restrictions:
-
-- Please **search for existing issues** in order to ensure we don't have duplicate bugs/feature requests.
-- Please be respectful and considerate of others when commenting on issues
-
-<a name="submit-a-bug-report"></a>
-## Submit a Bug Report
-
-Note: DO NOT include your credentials in ANY code examples, descriptions, or media you make public.
-
-A software bug is a demonstrable issue in the code base. In order for us to diagnose the issue and respond as quickly as possible, please add as much detail as possible into your bug report.
-
-Before you decide to create a new issue, please try the following:
-
-1. Check the Github issues tab if the identified issue has already been reported, if so, please add a +1 to the existing post.
-2. Update to the latest version of this code and check if the issue has already been fixed
-3. Copy and fill in the Bug Report Template we have provided below
-
-### Please use our Bug Report Template
-
-In order to make the process easier, we've included a [sample bug report template](ISSUE_TEMPLATE.md).
-
 <a name="improvements-to-the-codebase"></a>
 ## Improvements to the Codebase
 

PULL_REQUEST_TEMPLATE.md

@@ -28,4 +28,4 @@ A short description of what this PR does.
 - [ ] I have added the necessary documentation about the functionality in the appropriate .md file
 - [ ] I have added inline documentation to the code I modified
 
-If you have questions, please file a [support ticket](https://support.sendgrid.com), or create a GitHub Issue in this repository.
+If you have questions, please file a [support ticket](https://support.sendgrid.com).

README.md

@@ -13,9 +13,7 @@ Version 3.X.X of this library provides full support for all Twilio SendGrid [Web
 
 This library represents the beginning of a new path for Twilio SendGrid. We want this library to be community driven and Twilio SendGrid led. We need your help to realize this goal. To help make sure we are building the right things in the right order, we ask that you create [issues](https://github.com/sendgrid/sendgrid-go/issues) and [pull requests](CONTRIBUTING.md) or simply upvote or comment on existing issues or pull requests.
 
-Please browse the rest of this README for further detail.
-
-We appreciate your continued support, thank you!
+**If you need help using SendGrid, please check the [Twilio SendGrid Support Help Center](https://support.sendgrid.com).**
 
 # Table of Contents
 
@@ -247,9 +245,10 @@ Please see our [troubleshooting guide](TROUBLESHOOTING.md) for common library is
 
 sendgrid-go is maintained and funded by Twilio SendGrid, Inc. The names and logos for sendgrid-go are trademarks of Twilio SendGrid, Inc.
 
-If you need help installing or using the library, please check the [Twilio SendGrid Support Help Center](https://support.sendgrid.com).
+<a name="support"><a>
+# Support
 
-If you've instead found a bug in the library or would like new features added, go ahead and open issues or pull requests against this repo!
+If you need help using SendGrid, please check the [Twilio SendGrid Support Help Center](https://support.sendgrid.com).
 
 # License
 [The MIT License (MIT)](LICENSE)

sendgrid_test.go

@@ -34,7 +34,6 @@ func TestRepoFiles(t *testing.T) {
 		"CHANGELOG.md",
 		"CODE_OF_CONDUCT.md",
 		"CONTRIBUTING.md",
-		"ISSUE_TEMPLATE.md",
 		"LICENSE",
 		"PULL_REQUEST_TEMPLATE.md",
 		"README.md",