Remove unused parameter (tslint complaints)

Author: skovhus

server/src/server.ts

@@ -88,7 +88,7 @@ export function listen() {
     })
   })
 
-  connection.onDidChangeWatchedFiles(_change => {
+  connection.onDidChangeWatchedFiles(() => {
     // Monitored files have change in VSCode
     connection.console.log('We received an file change event')
   })