GH: remove the PR template

The team agreed that the template is not useful, thus removing it.

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,37 +0,0 @@
-
-This pull request includes:
-
-- [ ] adequate testing for the new functionality or fixed issue
-- [ ] adequate documentation informing people about the change such as
-  - [ ] submit a PR for the READMEs [listed here](https://github.com/osbuild/osbuild.github.io/blob/main/readme-list)
-  - [ ] submit a PR for the [osbuild.org website](https://github.com/osbuild/osbuild.github.io/) repository if this PR changed any behavior not covered by the automatically updated READMEs
-
-<!--
-Thanks for proposing a change to osbuild-composer!
-
-Please don't remove the above check list. These are things that each pull
-request must have before it is merged. It helps maintainers to not forget
-anything.
-
-If the reason for ticking any of the boxes is ambiguous, please add a short
-note explaining why.
-
-In addition, if this pull request fixes a downstream issue, please refer to
-test/README.md and add these additional items:
-
-- [ ] 1st commit of any `rhbz#` related PR contains bug reproducer; CI reports FAIL or
-- [ ] PR contains automated tests for new functionality and
-- [ ] QE has approved reproducer/new tests and
-- [ ] Subsequent commits provide bug fixes without modifying the reproducer; CI reports PASS and
-- [ ] QE approves this PR; RHBZ status is set to `MODIFIED + Verified=Tested`
-
-Information regarding our GitLab pipeline (Schutzbot):
-
-CI will not be ran automatically if WIP label is applied or the PR is in DRAFT state, instead only
-a link will be provided to the pipeline which can then be triggered manually if desired. To run the
-CI automatically either switch the PR to ready or apply WIP+test label.
-
-Outside contributors need manual approval from one of the osbuild-composer maintainers.
-
-Schutzbot will only be triggered if all Tests jobs in GitHub workflow succeed.
--->