Yes, a trademark can be removed from the trademark register if it is not being used. Many jurisdictions require that a trademark is actively used in commerce to maintain its registration and protection. This requirement is often referred to as "use in commerce" or "use in connection with the goods or services."
If a trademark owner fails to use their registered trademark for a certain period of time or fails to provide sufficient evidence of use when required, the trademark can be subject to cancellation or removal from the trademark register. The specific rules and timeframes for proving and maintaining trademark use vary by jurisdiction. It is important for trademark owners to understand and comply with the usage requirements to ensure the ongoing validity and protection of their trademarks.