The full No License Non-License is a statement of intent, not a legally binding document. Copyright licenses, even those with the most noble of intentions, rely on the enforcement of copyright law. This means all legally recognized licenses are predicated on leveraging state power, thus violent coercion. The No License Non-License statement is a recognition and circumnavigation of state violence, an agreement between the author of the software and those who wish to use and distribute it without the threat of legal force.
You may use any variation of the No License Non-License statement. Here is the full, long-form variant, which conveys the absence of license and the author's intent:
NO LICENSE v2
This work is released without a license. The author of this work does not
recognize any rights granted by law related to its ownership. The author intends
no legal response to any use, modification, or distribution of the work. This is
not a license. No legal protection is offered. Use, modify, or distribute this
work, if you want.
Alternatively, you may use this form, which lacks such opinion:
NO LICENSE
This work is released without a license.
Your non-license may contain different content if you like. Choosing to include no license file at all is an excellent way to distribute your work with No License. However, a non-license statement such as this one may clarify intentions regarding the distribution of your work.