如何使用 CLI 工具从我的 Linux 系统中完全删除 mime 关联？

我正在运行 Arch Linux 和 KDE。我已经在几台设备上安装了 Arch KDE，在通常情况下，文件没有特定的 mime 类型关联.pub（在我的情况下是公钥）。它们将由纯文本文档的默认处理程序打开。这是我希望在我的标准 Arch Linux 安装中看到的：

$ xdg-mime query filetype id_rsa_test.pub
text/plain

但是，在我的主桌面上，.pub文件与 ms-publisher 相关联。

$ xdg-mime query filetype id_rsa_test.pub
application/vnd.ms-publisher

我想完全删除这个关联。以下是我发现这种关联证据的一些地方：

$ grep -irl '.pub' ./.local/share/mime/
./.local/share/mime/packages/application-vnd.ms-publisher.xml
./.local/share/mime/application/vnd.ms-publisher.xml
./.local/share/mime/globs
./.local/share/mime/globs2
./.local/share/mime/types
./.local/share/mime/mime.cache

$ sudo grep -irl 'ms-publisher' /usr
/usr/share/applications/mimeinfo.cache
/usr/share/mime/packages/freedesktop.org.xml
/usr/share/mime/application/vnd.ms-publisher.xml
/usr/share/mime/globs
/usr/share/mime/globs2
/usr/share/mime/subclasses
/usr/share/mime/types
/usr/share/mime/mime.cache
/usr/share/icons/breeze/mimetypes/64/application-vnd.ms-publisher.svg
/usr/share/icons/breeze/mimetypes/22/application-vnd.ms-publisher.svg
/usr/share/icons/breeze/breeze-icons.rcc
/usr/share/icons/breeze/icon-theme.cache
/usr/share/icons/breeze-dark/mimetypes/22/application-vnd.ms-publisher.svg
/usr/share/icons/breeze-dark/breeze-icons-dark.rcc
/usr/share/icons/breeze-dark/icon-theme.cache
/usr/lib/libreoffice/share/xdg/draw.desktop

根据xdg-mime手册页，该uninstall命令可能会起作用。至少在我的情况下，该uninstall命令无效。

# xdg-mime uninstall /usr/share/mime/application/vnd.ms-publisher.xml
# echo $?
0

# sudo grep -irl 'ms-publisher' /usr
/usr/share/file/misc/magic.mgc
/usr/share/applications/mimeinfo.cache
/usr/share/mime/packages/freedesktop.org.xml
/usr/share/mime/application/vnd.ms-publisher.xml
/usr/share/mime/globs
/usr/share/mime/globs2
/usr/share/mime/subclasses
/usr/share/mime/types
/usr/share/mime/mime.cache
/usr/share/icons/breeze/mimetypes/64/application-vnd.ms-publisher.svg
/usr/share/icons/breeze/mimetypes/22/application-vnd.ms-publisher.svg
/usr/share/icons/breeze/breeze-icons.rcc
/usr/share/icons/breeze/icon-theme.cache
/usr/share/icons/breeze-dark/mimetypes/22/application-vnd.ms-publisher.svg
/usr/share/icons/breeze-dark/breeze-icons-dark.rcc
/usr/share/icons/breeze-dark/icon-theme.cache
/usr/lib/libreoffice/share/xdg/draw.desktop

# grep -irl '.pub' /usr/share/mime/
/usr/share/mime/packages/freedesktop.org.xml
/usr/share/mime/packages/calibre-mimetypes.xml
/usr/share/mime/application/pkcs7-mime.xml
/usr/share/mime/application/pkcs8-encrypted.xml
/usr/share/mime/application/epub+zip.xml
/usr/share/mime/application/x-pkcs7-certificates.xml
/usr/share/mime/application/pkcs8.xml
/usr/share/mime/application/pkcs10.xml
/usr/share/mime/application/pkcs12.xml
/usr/share/mime/application/vnd.ms-publisher.xml
/usr/share/mime/globs
/usr/share/mime/globs2
/usr/share/mime/magic
/usr/share/mime/subclasses
/usr/share/mime/types
/usr/share/mime/generic-icons
/usr/share/mime/mime.cache

对于我的问题，我想大致了解如何仅使用 CLI 工具从我的系统中删除任何mime 类型关联。

编辑：对答案的回应：

在新用户帐户上，我显示以下内容：

sudo pacman -Qs shared-mime-info
local/shared-mime-info 1.15-2
    Freedesktop.org Shared MIME Info

$ xdg-mime query filetype id_rsa_test.pub
text/plain

$ xdg-mime query default text/plain
atom.desktop

$ less ~/.config/mimeapps.list
/home/deleteme/.config/mimeapps.list: No such file or directory

该系统已多次（每天）更新，与.pub文件的 ms-publisher 关联尚未恢复。请注意，这个系统已经shared-mime-info安装，我可以使用纯文本编辑器打开公钥文件，正如我所料。在此系统上的另一个用户帐户中，我通过~/.config/mimeapps.list该用户的条目获得了我的首选关联。

$ xdg-mime query default text/plain
org.kde.kate.desktop

回到主要问题：如何.pub在系统级别完全删除文件与 Okular 和/或 Libre Office Draw 的关联？即使这不是批准的方法，我该怎么做？