Revert "docs: help users write more clear bug reports with a template"

This reverts commit 0a80e30f46.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,46 +0,0 @@
-**Describe the bug**
-
-A clear and concise description of what the bug is.
-
-**To Reproduce**
-
-Steps to reproduce the behavior:
-
-1. Have a rack-attack config as follows:
-
-```ruby
-  # E.g.
-
-  Rack::Attack.cache.store = " ... "
-
-  Rack::Attack.throttle(...
-
-  # And so on
-
-```
-
-2. Start the app server
-3. Visit the page with path '....'
-4. See error
-
-**Expected behavior**
-
-A clear and concise description of what you expected to happen.
-
-**Screenshots**
-
-If applicable, add screenshots to help explain your problem.
-
-**Environment information (please complete the following information):**
-
- - rack-attack version:
- - ruby version:
- - rack version:
- - rails version (if using rails):
- - rails environment (if using rails): [e.g. development, production, all]
- - redis gem version (if reporting redis-related issue):
- - redis server version (if reporting redis-related issue):
-
-**Additional context**
-
-Add any other context about the problem you think can help here.