Delete old issues from GitHub's bug report template

Author: saruman9

.github/ISSUE_TEMPLATE/bug_report.md

@@ -13,12 +13,9 @@ Forum for questions: https://users.rust-lang.org/c/ide/14
 
 Before submitting, please make sure that you're not running into one of these known issues:
 
- 1. local imports (`use` statements) don't work: #1165
- 2. local items don't work: #1559
- 3. on-the-fly diagnostics are mostly unimplemented (`cargo check` diagnostics will be shown when saving a file)
- 4. some settings are required for procedural macro and build script support (`rust-analyzer.cargo.loadOutDirsFromCheck`, `rust-analyzer.procMacro.enable`): #6448
- 5. some platform-specific imports are not resolved: #6038
- 6. the official `rust-lang.rust` VS Code extension conflicts with `rust-analyzer`: #6463
+ 1. on-the-fly diagnostics are mostly unimplemented (`cargo check` diagnostics will be shown when saving a file)
+ 2. some settings are required for procedural macro and build script support (`rust-analyzer.cargo.loadOutDirsFromCheck`, `rust-analyzer.procMacro.enable`): #6448
+ 3. some platform-specific imports are not resolved: #6038
 
 Otherwise please try to provide information which will help us to fix the issue faster. Minimal reproducible examples with few dependencies are especially lovely <3.
 -->