No. As stated on page 184, you cannot remove a model from a unit of Skirmishers if doing so would cause the unit to lose coherency. However, if an attack targets a specific model (such as a champion or a character), that model must be removed if the attack reduces it to zero Wounds. In such cases, simply replace the removed model with another model belonging to the same unit, one that could be removed as a casualty, in order to maintain unit coherency.

As mentioned previously, the models that make up a Warhammer army must be formed into 'units' before battle commences and all units must adopt a formation. The core rules cover in detail Close Order formations, which are by far the most commonly seen – but by no means the only – type of formation. The following sections introduce the rules for Open Order and Skirmish formations. These are the two most frequently seen unusual formations, and every army will have the option to include units that can adopt them. A wise general will make full use of such units to exploit terrain, to harass the enemy from unexpected quarters and to protect their own vulnerable flanks.

Warhammer: The Old World Online Rules Index

Unusual Formations - Frequently Asked Questions
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Some attacks allow a specific model within a unit to be targeted. Can such an attack be used to break the coherency of a unit of Skirmishers and cause other models to be removed as well?
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Unusual Formations - Frequently Asked QuestionsURL Copied!

Some attacks allow a specific model within a unit to be targeted. Can such an attack be used to break the coherency of a unit of Skirmishers and cause other models to be removed as well?URL Copied!

Unusual Formations - Frequently Asked Questions
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Some attacks allow a specific model within a unit to be targeted. Can such an attack be used to break the coherency of a unit of Skirmishers and cause other models to be removed as well?
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