network: remove the required account in creating a network (#830)

diff --git a/src/views/network/CreateIsolatedNetworkForm.vue b/src/views/network/CreateIsolatedNetworkForm.vue
index 8c71469..8414086 100644
--- a/src/views/network/CreateIsolatedNetworkForm.vue
+++ b/src/views/network/CreateIsolatedNetworkForm.vue
@@ -223,11 +223,7 @@
               </a-tooltip>
             </span>
             <a-input
-              v-decorator="['account', {
-                rules: [
-                  { required: true, message: $t('label.required') }
-                ]
-              }]"
+              v-decorator="['account']"
               :placeholder="this.$t('label.account')"/>
           </a-form-item>
           <div :span="24" class="action-button">
diff --git a/src/views/network/CreateL2NetworkForm.vue b/src/views/network/CreateL2NetworkForm.vue
index 3146471..d1a6057 100644
--- a/src/views/network/CreateL2NetworkForm.vue
+++ b/src/views/network/CreateL2NetworkForm.vue
@@ -197,11 +197,7 @@
               </a-tooltip>
             </span>
             <a-input
-              v-decorator="['account', {
-                rules: [
-                  { required: true, message: $t('label.required') }
-                ]
-              }]"
+              v-decorator="['account']"
               :placeholder="this.$t('label.account')"/>
           </a-form-item>
           <div :span="24" class="action-button">