Switch to single trunk branch.

Author: joaander

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,8 +1,3 @@
-<!-- Please confirm that your work is based on the correct branch. -->
-<!-- Bug fixes should be based on *trunk-patch*. -->
-<!-- Backwards compatible new features should be based on *trunk-minor*. -->
-<!-- Incompatible API changes should be based on *trunk-major*. -->
-
 ## Description
 
 <!-- Describe your changes in detail. -->
@@ -23,7 +18,7 @@ Resolves #???
 
 ## Checklist:
 
-- [ ] I have reviewed the [**Contributor Guidelines**](https://github.com/glotzerlab/hoomd-blue/blob/trunk-minor/CONTRIBUTING.rst).
-- [ ] I agree with the terms of the [**HOOMD-blue Contributor Agreement**](https://github.com/glotzerlab/hoomd-blue/blob/trunk-minor/ContributorAgreement.md).
+- [ ] I have reviewed the [**Contributor Guidelines**](https://github.com/glotzerlab/hoomd-blue/blob/trunk/CONTRIBUTING.rst).
+- [ ] I agree with the terms of the [**HOOMD-blue Contributor Agreement**](https://github.com/glotzerlab/hoomd-blue/blob/trunk/ContributorAgreement.md).
 - [ ] My name is on the list of contributors (`sphinx-doc/credits.rst`) in the pull request source branch.
 - [ ] I have summarized these changes in `CHANGELOG.rst` following the established format.

.github/workflows/release.yaml

@@ -9,7 +9,7 @@ on:
 
   push:
     branches:
-    - "trunk-*"
+    - "trunk"
     tags:
       - "v*"
 

.github/workflows/style.yaml

@@ -11,7 +11,7 @@ on:
 
   push:
     branches:
-    - "trunk-*"
+    - "trunk"
 
 jobs:
   prek:

.github/workflows/test.yaml

@@ -10,7 +10,7 @@ on:
 
   push:
     branches:
-    - "trunk-*"
+    - "trunk"
 
   workflow_dispatch:
 

CONTRIBUTING.rst

@@ -34,9 +34,7 @@ Version control
 Base your work off the correct branch
 _____________________________________
 
-- Base backwards compatible bug fixes on ``trunk-patch``.
-- Base additional functionality on ``trunk-minor``.
-- Base API incompatible changes on ``trunk-major``.
+- Base bug fixes, new functionality, and API incompatible changes on ``trunk``.
 
 Propose a minimal set of related changes
 ________________________________________