delete unused source code

src/client/js/services/RevisionCompareContainer.js

@@ -27,8 +27,6 @@ export default class RevisionCompareContainer extends Container {
     };
 
     this.initRevisions = this.initRevisions.bind(this);
-    this.handleFromRevisionChange = this.handleFromRevisionChange.bind(this);
-    this.handleToRevisionChange = this.handleToRevisionChange.bind(this);
     this.fetchLatestRevision = this.fetchLatestRevision.bind(this);
   }
 
@@ -47,14 +45,6 @@ export default class RevisionCompareContainer extends Container {
     this.setState({ fromRevision, toRevision, latestRevision });
   }
 
-  handleFromRevisionChange(revision) {
-    this.setState({ fromRevision: revision });
-  }
-
-  handleToRevisionChange(revision) {
-    this.setState({ toRevision: revision });
-  }
-
   get compareRevisionIds() {
     const searchParams = {};
     for (const param of window.location.search?.substr(1)?.split('&')) {