Remove section about merge strategy

CONTRIBUTING.md

@@ -39,14 +39,6 @@ Include the following information when submitting a pull request:
   - Using the `This fixes {link to issue}` syntax will automatically close the
     issue once merged.
 
-## Merge Strategy
-
-We use the _squash merging_ strategy when merging pull requests to improve the
-quality of the change history and make the commit log easier to navigate.
-
-A further explanation about the benefits of this strategy can be found
-[here](https://blog.dnsimple.com/2019/01/two-years-of-squash-merge/).
-
 ## Unit Tests
 
 Unit tests should be created and maintained as changes are made to the core