feat(treasury): remove placeholder text from financial plan account selection

src/components/financial/AddTreasuryLaunchDialog.vue

@@ -36,7 +36,6 @@
             input-debounce="0"
             :rules="[inputRules.required]"
             label="Plano de Contas"
-            placeholder="Selecione a conta"
             class="col-12"
             @filter="filterPlanAccounts"
           />