Do not delete unknown files during a reset

Dependencies

• [2] CCLLB7OI Upgrading to Sanakirja 0.15 + version bump
• [3] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [4] VO5OQW4W Removing anyhow in libpijul
• [5] 5BRU2RRW Cleanup (debugging a crash related to trees/inodes)

Change contents

• replacement in libpijul/src/output/output.rs at line 391
  [2.85288]→[3.686069:686114](∅→∅),[3.2823]→[3.686069:686114](∅→∅),[3.23121]→[3.686069:686114](∅→∅),[3.686069]→[3.686069:686114](∅→∅),[3.686114]→[3.23122:23193](∅→∅)
  − }

  − if let Some(name) = name {

  − repo.remove_path(&name).map_err(OutputError::WorkingCopy)?
  [2.85288]

  [3.686151]
  + if let Some(name) = name {

  + repo.remove_path(&name).map_err(OutputError::WorkingCopy)?

  + }