refactor(network): Netzwerkklasse entfernen und Methoden statisch machen.

- Unnötige Funktionen entfernen.

EnvelopeGenerator.Web/wwwroot/js/app.js

@@ -13,9 +13,6 @@ class App {
     constructor(envelopeKey, envelopeReceiver, documentBytes, licenseKey, locale, container) {
         this.container = container ?? `#${this.constructor.name.toLowerCase()}`;
         this.envelopeKey = envelopeKey
-
-        this.Network = new Network()
-
         this.Instance = null
         this.currentDocument = null
         this.currentReceiver = null
@@ -275,7 +272,7 @@ class App {
 
                 // Export annotation data and save to database
                 try {
-                    const res = await this.Network.postEnvelope(this.envelopeKey, await iJSON);
+                    const res = await postEnvelope(this.envelopeKey, await iJSON);
 
                     if (!res.ok) {
                         if (res.status === 403) {