Package extras are not removed when install command is given --sync option

[zyzzyxdonta]

• Poetry version: Poetry (version 1.3.2)
• Python version: 3.11.1
• OS version and name: Fedora Linux 37 (KDE Plasma)
• pyproject.toml: https://gist.github.com/zyzzyxdonta/07d47b495cdcf4735eee14c816d4d8a3

• I am on the latest stable Poetry version, installed using a recommended method.
• I have searched the issues of this repo and believe that this is not a duplicate.
• I have consulted the FAQ and blog for any relevant entries or release notes.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option) and have included the output below.

Issue

When poetry install is executed with the --sync option, currently installed extras are not removed:

[david:/tmp/tmp.eORMnPgjG6] $ poetry install
Creating virtualenv test-qNG81csJ-py3.11 in /home/david/.cache/pypoetry/virtualenvs
Updating dependencies
Resolving dependencies... (0.2s)

Writing lock file

Package operations: 5 installs, 0 updates, 0 removals

  • Installing certifi (2022.12.7)
  • Installing charset-normalizer (3.0.1)
  • Installing idna (3.4)
  • Installing urllib3 (1.26.14)
  • Installing requests (2.28.2)
[david:/tmp/tmp.eORMnPgjG6] 4s $ poetry install --extras toml
Installing dependencies from lock file

Package operations: 1 install, 0 updates, 0 removals

  • Installing tomli (2.0.1)
[david:/tmp/tmp.eORMnPgjG6] $ poetry install --sync
Installing dependencies from lock file

No dependencies to install or update
[david:/tmp/tmp.eORMnPgjG6] $ poetry install
Installing dependencies from lock file

Package operations: 0 installs, 0 updates, 1 removal

  • Removing tomli (2.0.1)

I believe that this is not in line with the documentation which states:

Any extras not selected for install are always removed, regardless of --sync.