RemoveZoomApp.pkginfo

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>_metadata</key>
	<dict>
		<key>created_by</key>
		<string>jonasb</string>
		<key>creation_date</key>
		<date>2020-04-02T13:42:34Z</date>
		<key>munki_version</key>
		<string>4.1.2.3939</string>
		<key>os_version</key>
		<string>10.14.6</string>
	</dict>
	<key>autoremove</key>
	<false/>
	<key>catalogs</key>
	<array>
		<string>testing</string>
	</array>
	<key>installcheck_script</key>
	<string>#!/bin/sh

APP=/Applications/zoom.us.app

if [ -d "$APP" ];
then
  exit 0
fi
exit 1
</string>
	<key>installer_type</key>
	<string>nopkg</string>
	<key>minimum_os_version</key>
	<string>10.4.0</string>
	<key>name</key>
	<string>RemoveZoomApp</string>
	<key>postinstall_script</key>
	<string>#!/bin/sh

APP=/Applications/zoom.us.app

if [ -d "$APP" ];
then
  rm -rf $APP
fi
</string>
	<key>unattended_install</key>
	<true/>
	<key>version</key>
	<string>1.0</string>
</dict>
</plist>

As far as I know, this (or the installcheck_script part at least) will run every time munki runs, and if a user has installed Zoom after this has been run it will be deleted every time.

Thanks