chore: issue template cleanup

.github/ISSUE_TEMPLATE.md

@@ -1,13 +0,0 @@
-Hey, thanks for contributing to Koel! To save time for both of us, please make sure these checkboxes are checked before submitting the issue:
-
-- [ ] You have read and followed closely the [Wiki](https://koel.phanan.net/docs), [Upgrade Guide](https://github.com/phanan/koel/releases), as well as [Troubleshooting](https://koel.phanan.net/docs/#/troubleshooting)
-- [ ] The issue has not been reported before
-- [ ] This is not a "how to install on Windows" or "why is my npm messed up" question
-- [ ] You're a cool person
-
-All checked? Now also make sure your issue
-
-- [ ] Is associated with a version. Or better yet, a commit.
-- [ ] Is as detailed as possible (ahem... OS, browser, steps to reproduce, maybe?)
-- [ ] Includes the error output if it's a bug/error report ("Whoops!" is not very helpful, you know)
-- [ ] Is in English, 因为我不说中文。