Remove mentioning of the re-licensing

I can't even contact with the original author of the library, so it does make absolute no sense

.github/pull_request_template.md

@@ -1,8 +1,6 @@
 <!--
 Please read the contribution guidelines before submitting a pull request:
-https://github.com/YarikTH/ureact/blob/master/CONTRIBUTING.md.
-By submitting this pull request, you agree that your contributions are licensed
-under the µReact license, and agree to future changes to the licensing.
+https://github.com/YarikTH/ureact/blob/main/CONTRIBUTING.md.
 -->
 
 ## Description

CONTRIBUTING.md

@@ -1,10 +1,5 @@
 # Contributing to µReact
 
-By submitting a pull request or a patch, you represent that you have the right
-to license your contribution to the µReact project owners and the community,
-agree that your contributions are licensed under the µReact license, and agree
-to future changes to the licensing.
-
 All pull requests should be made against the ```dev``` branch because
 the ```main``` is the stable one with the latest release.