```coffeescript
'.editor':
  'ctrl-m': 'bracket-matcher:go-to-matching-bracket'
  'ctrl-]': 'bracket-matcher:remove-brackets-from-selection'

'.platform-darwin .editor':
  'ctrl-cmd-m': 'bracket-matcher:select-inside-brackets'
  'alt-cmd-.': 'bracket-matcher:close-tag'

'.platform-linux .editor':
  'alt-ctrl-.': 'bracket-matcher:close-tag'

'.platform-win32 .editor':
  'alt-ctrl-.': 'bracket-matcher:close-tag'
```

Add a new keymap `ctrl-backspace`
user
```coffeescript
'.editor':
  'ctrl-m': 'bracket-matcher:go-to-matching-bracket'
  'ctrl-]': 'bracket-matcher:remove-brackets-from-selection'
  'ctrl-backspace': 'bracket-matcher:remove-matching-brackets'

'.platform-darwin .editor':
  'ctrl-cmd-m': 'bracket-matcher:select-inside-brackets'
  'alt-cmd-.': 'bracket-matcher:close-tag'

'.platform-linux .editor':
  'alt-ctrl-.': 'bracket-matcher:close-tag'

'.platform-win32 .editor':
  'alt-ctrl-.': 'bracket-matcher:close-tag'
```
assistant