Simplified the PR template.

Author: arbox

pull_request_template.md

@@ -1,16 +1,4 @@
-# REPLACE_ME_WITH_A_DESCRIPTIVE_TITLE
-
-**REPLACE_ME_WITH_A_LINK_TO_YOU_ADDITION**
-
 I want to contribute to this list and help the maintainers, so:
 
-- [ ] I've accepted the terms of the [`CC0` License](LICENSE);
-- [ ] I've provided a descriptive commit message.
-
-In case it suits and can help I did the following:
-
-- [ ] I've mentioned the originator of the contribution in my commit message;
-- [ ] I've added the topic `rubyml` to the contributed repository (or kindly
-      asked the originator to do so in a new issue).
-
-:sparkles: The curators really appreciate this pull request! :sparkles:
+- [ ] I've accepted the terms of the `CC0` License;
+- [ ] I've added the topic `rubyml` to the contributed repository if appropriate.