Hide special metadata values from display

app/server/static/components/annotation.pug

@@ -103,7 +103,7 @@ div.columns(v-cloak="")
           )
         section.modal-card-body.modal-card-body-footer
           vue-json-pretty(
-            v-bind:data="documentMetadata"
+            v-bind:data="displayDocumentMetadata"
             v-bind:show-double-quotes="false"
             v-bind:show-line="false"
           )

app/server/static/components/annotationMixin.js

@@ -297,6 +297,18 @@ export default {
         : 'Click to approve annotations';
     },
 
+    displayDocumentMetadata() {
+      let documentMetadata = this.documentMetadata;
+      if (documentMetadata == null) {
+        return null;
+      }
+
+      documentMetadata = { ...documentMetadata };
+      delete documentMetadata.guideline;
+      delete documentMetadata.documentSourceUrl;
+      return documentMetadata;
+    },
+
     documentMetadata() {
       const document = this.docs[this.pageNumber];
       if (document == null || document.meta == null) {