bug: programmatically-irremovable clutter left in user remote.yaml after global remotes are removed

[preminger]

Version of Singularity

singularity-ce version 3.11.0+526-g0cd5affc0 (checked out from main)

Describe the bug

After certain sequences of singularity remote / sudo singularity remote commands, there is "clutter" left in the user's remote.yaml file that cannot be removed by using the singularity CLI, and can only be removed by manually editing the remote.yaml file.

To Reproduce

sudo singularity remote add --global test https://test.example.com
singularity remote use SylabsCloud
singularity remote list
sudo singularity remote remove --global test

Expected behavior

$ singularity remote list

NAME         URI               DEFAULT?  GLOBAL?  EXCLUSIVE?  SECURE?
SylabsCloud  cloud.sylabs.io   ✓         ✓                    ✓

Observed behavior

$ singularity remote list

NAME         URI               DEFAULT?  GLOBAL?  EXCLUSIVE?  SECURE?
SylabsCloud  cloud.sylabs.io   ✓         ✓                    ✓
test         test.example.com            ✓                    ✓

Additionally, the "dangling" remote now cannot be removed using the CLI at the user level nor at the system level:

$ singularity remote remove test
FATAL:   test is global and can't be removed

$ sudo singularity remote remove --global test
FATAL:   test is not a remote

It can only be removed by manually editing the user's ~/.singularity/remote.yaml file.

OS / Linux Distribution

$ cat /etc/os-release
NAME="Red Hat Enterprise Linux"
VERSION="9.2 (Plow)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="9.2"
PLATFORM_ID="platform:el9"
PRETTY_NAME="Red Hat Enterprise Linux 9.2 (Plow)"
ANSI_COLOR="0;31"
LOGO="fedora-logo-icon"
CPE_NAME="cpe:/o:redhat:enterprise_linux:9::baseos"
HOME_URL="https://www.redhat.com/"
DOCUMENTATION_URL="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9"
BUG_REPORT_URL="https://bugzilla.redhat.com/"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 9"
REDHAT_BUGZILLA_PRODUCT_VERSION=9.2
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="9.2"

Installation Method

Source (from main).