suppress link to download in about window

src/cutecoin/gui/mainwindow.py

@@ -234,17 +234,13 @@ class MainWindow(QMainWindow, Ui_MainWindow):
 
         latest = self.app.available_version
         version_info = ""
-        version_url = ""
         if not latest[0]:
             version_info = self.tr("Latest release : {version}") \
                 .format(version='.'.join(latest[1]))
-            version_url = latest[2]
 
         new_version_text = self.tr("""
             <p><b>{version_info}</b></p>
-            <p><a href={version_url}>Download link</a></p>
-            """).format(version_info=version_info,
-                       version_url=version_url)
+            """).format(version_info=version_info)
         text = self.tr("""
         <h1>Cutecoin</h1>
 
@@ -268,8 +264,6 @@ class MainWindow(QMainWindow, Ui_MainWindow):
     @pyqtSlot()
     def latest_version_requested(self):
         latest = self.app.available_version
-        version_info = ""
-        version_url = ""
         logging.debug("Latest version requested")
         if not latest[0]:
             version_info = self.tr("Please get the latest release {version}") \