Update shield's tooltip (#1466)

src/locales/en.json

@@ -156,6 +156,6 @@
     "zoomToFit": "Zoom to fit all elements"
   },
   "encrypted": {
-    "tooltip": "Your drawings are end-to-end encrypted so Excalidraw's servers will never see them.\nClick the icon to learn more..."
+    "tooltip": "Your drawings are end-to-end encrypted so Excalidraw's servers will never see them."
   }
 }