using now session cookies to store protectedSessionId

src/public/javascripts/services/server.js

@@ -3,18 +3,10 @@ import utils from './utils.js';
 import infoService from "./info.js";
 
 function getHeaders() {
-    let protectedSessionId = null;
-
-    try { // this is because protected session might not be declared in some cases
-        protectedSessionId = protectedSessionHolder.getProtectedSessionId();
-    }
-    catch(e) {}
-
     // headers need to be lowercase because node.js automatically converts them to lower case
     // so hypothetical protectedSessionId becomes protectedsessionid on the backend
     // also avoiding using underscores instead of dashes since nginx filters them out by default
     return {
-        'trilium-protected-session-id': protectedSessionId,
         'trilium-source-id': glob.sourceId
     };
 }