pe">MaybePromise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">undefined</span> <span class="tsd-signature-symbol">|</span> <a class="tsd-signature-type tsd-kind-type-parameter" href="#gett">T</a><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">;</span><br/>    <a class="tsd-kind-call-signature" href="#remove-1">remove</a><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">key</span><span class="tsd-signature-