chore: remove scope section from pr template (#397)

Author: aajtodd

.github/pull_request_template.md

@@ -6,10 +6,4 @@
 ## Description of changes
 <!--- Why is this change required? What problem does it solve? -->
 
-
-## Scope
-<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
-- [ ] Bug fix (non-breaking change which fixes an issue)
-- [ ] New feature (non-breaking change which adds functionality)
-
 By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.