n></span> <span><a href="../../Csp/index.html#type-decl">Csp.decl</a> <span class="arrow">&#45;&gt;</span></span> <a href="#type-t">t</a></span></code></div><div class="spec-doc"><p>adds an unconstrained variable to the environnement</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-rm_var"><a href="#val-rm_var" class="anchor"></a><code><span><span class="keyword">val</span> rm_var : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span>string <span cla