init.vim: Standardize on ALE for linting.
init.vim: Standardize on ALE for linting.

  - Eliminate now-redundant autocommands for trimming whitespace.

  - Eliminate unnecessary Prettier plugin and configuration. ALE will
    now run Prettier as needed using the local project config.

mahipal/dotfiles,mahipal/dotfiles,paulrex/dotfiles,paulrex/dotfiles