Delete app-content-pages code

[goplayoutside3]

Package

app-content-pages

Linked Issue and/or Talk Post

Follow-up to #6311

Describe your changes

• Delete the app-content-pages package
• Ran yarn to update yarn.lock
• Also updated the Github Issue template with accurate package names.

How to Review

General

• Tests are passing locally and on Github
• Documentation is up to date and changelog has been updated if appropriate
• You can yarn panic && yarn bootstrap or docker-compose up --build and FEM works as expected
• FEM works in all major desktop browsers: Firefox, Chrome, Edge, Safari (Use Browserstack account as needed)

[coveralls]

coverage: 78.586% (-0.2%) from 78.759%
when pulling 4e09f8c on delete-app-content-pages
into 7a882be on master.