message: <C-h> should be equivalent to <BS> in insert mode
  Vim treats these as the same key; <C-h> does not have simplified semantics.
diff: @@ -231,7 +231,7 @@ class CommandInsertIndentInCurrentLine extends BaseCommand {
  @RegisterAction
  export class CommandBackspaceInInsertMode extends BaseCommand {
  modes = [Mode.Insert];
  - keys = ['<BS>'];
  + keys = [['<BS>'], ['<C-h>']];
  public async exec(position: Position, vimState: VimState): Promise<void> {
  const line = vimState.document.lineAt(position).text;
  @@ -526,19 +526,6 @@ class CommandInsertAboveChar extends BaseCommand {
  }
  }
  -@RegisterAction
  -class CommandCtrlHInInsertMode extends BaseCommand {
  - modes = [Mode.Insert];
  - keys = ['<C-h>'];
  -
  - public async exec(position: Position, vimState: VimState): Promise<void> {
  - vimState.recordedState.transformer.addTransformation({
  - type: 'deleteText',
  - position: position,
  - });
  - }
  -}
  -
  @RegisterAction
  class CommandCtrlUInInsertMode extends BaseCommand {
  modes = [Mode.Insert];
  