Remove references to Atom.

Author: garnertb

Diff for: docs/01_getting_ready_for_class.md

@@ -105,29 +105,20 @@ For this class, we will use a basic text editor to interact with our code. Let's
 
 You can use almost any text editor, but we have the best success with the following:
 
-- [Atom](https://atom.io/)
 - [Visual Studio Code](https://code.visualstudio.com)
 - Notepad
 - Vi or Vim
 - Sublime
 - Notepad++
 - GitPad
 
-If you do not already have a text editor installed, go ahead and download and install one of the above editors now! You can also configure Atom or Visual Studio Code as your default text editor for Git commands using the [instructions at docs.github.com](https://docs.github.com/github/using-git/associating-text-editors-with-git).
+If you do not already have a text editor installed, go ahead and download and install one of the above editors now! You can also configure Visual Studio Code as your default text editor for Git commands using the [instructions at docs.github.com](https://docs.github.com/github/using-git/associating-text-editors-with-git).
 
 #### Your editor on the command-line
 
 After you have installed an editor, confirm you can open it from the command-line.
 
-If installed properly, the following command will open the Atom text editor:
-
-```sh
-atom .
-```
-
-_**Note:** If you are working on a Mac, you will need to Install Shell Commands from the Atom menu, this happens as part of the installation process for Windows._
-
-Or the following command can also open the current directory with Visual Studio Code:
+If installed properly, the following command will open the Visual Studio Code editor:
 
 ```sh
 code .

Diff for: docs/06a_activity_create_file.md

@@ -9,4 +9,4 @@ Now it is time to put an image and a caption into your file:
 
 > Git doesn't care how you work with your files locally. You can work in your favorite IDE or text editor, or you can use VIM through the command line.
 >
-> To open your file from the command line, many IDEs and text editors offer shortcuts. For example, use `atom .` to open the project in Atom, and `code .` to open it in Visual Studio Code.
+> To open your file from the command line, many IDEs and text editors offer shortcuts. For example, use `code .` to open it in Visual Studio Code.

Diff for: docs/app_issue_template.md

@@ -22,7 +22,6 @@ GitHub supports multiple issue templates, so within our groups we are going to c
 
 Before creating the template, it might be helpful to find existing issue templates on other open source projects on GitHub to get some inspiration. Below are some examples of issue templates found on GitHub:
 
-- [atom/atom](https://github.com/atom/atom/issues/new/choose)
 - [electron/electron](https://github.com/electron/electron/issues/new/choose)
 - [github/VisualStudio](https://github.com/github/VisualStudio/issues/new/choose)
 - [github/training-kit](https://github.com/github/training-kit/blob/master/.github/ISSUE_TEMPLATE.md)