fix so that project agent & location removals get saved

src/views/NewEditProjectView.vue

@@ -265,6 +265,8 @@ export default class NewEditProjectView extends Vue {
       vcClaim.agent = {
         identifier: this.agentDid,
       };
+    } else {
+      delete vcClaim.agent;
     }
     if (this.includeLocation) {
       vcClaim.location = {
@@ -274,6 +276,8 @@ export default class NewEditProjectView extends Vue {
           longitude: this.longitude,
         },
       };
+    } else {
+      delete vcClaim.location;
     }
     // Make a payload for the claim
     const vcPayload = {