chore: remove team assignment from codeowners (#27573)

Issue number: N/A

---------

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## What is the current behavior?
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PRs are first assigned to the team before being assigned to a single
team member. This causes reviews to show up
https://github.com/notifications for everyone even if they are not the
final reviewer.

## What is the new behavior?
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this PR. -->

- GitHub automatically assigns reviewers now, so I removed the global
Framework team codeowner. All PRs in this repo should have a team member
automatically assigned.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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and migration path for existing applications below. -->


## Other information

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screenshots of how the component looks before and after the change. -->

.github/CODEOWNERS

@@ -11,9 +11,6 @@
 # In each subsection folders are ordered first by depth, then alphabetically.
 # This should make it easy to add new rules without breaking existing ones.
 
-# Global owners
-* @ionic-team/framework
-
 # Frameworks
 
 ## Angular
@@ -56,9 +53,6 @@
 /core/src/components/refresher/ @liamdebeasi
 /core/src/components/refresher-content/ @liamdebeasi
 
-# Codeowner should own the source, but everyone should own the tests
-/core/src/components/**/test/ @ionic-team/framework
-
 # Utilities
 
 /core/src/utils/animation/ @liamdebeasi