Remove luxon dependency

package.json

@@ -177,7 +177,6 @@
     "crypto-browserify": "^3.12.0",
     "ethers": "^5.1.4",
     "execa": "^5.0.0",
-    "luxon": "^1.26.0",
     "marked": "^2.0.3",
     "mnemonist": "^0.38.3",
     "pure-svg-code": "^1.0.6",

ui/Screen/NetworkDiagnostics/WaitingRoom.svelte

@@ -1,5 +1,4 @@
 <script lang="typescript">
-  import { DateTime } from "luxon";
   import { onDestroy } from "svelte";
   import JSONTree from "svelte-json-tree";
 
@@ -59,7 +58,7 @@
           <td>
             <JSONTree value={transition.event} />
           </td>
-          <td>{DateTime.fromMillis(transition.timestamp).toISOTime()}</td>
+          <td>{new Date(transition.timestamp).toISOString()}</td>
           <td>
             <StateTable state={transition.state_before} />
           </td>

yarn.lock

@@ -8806,13 +8806,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"luxon@npm:^1.26.0":
-  version: 1.26.0
-  resolution: "luxon@npm:1.26.0"
-  checksum: e12bb8bfdd69707f0f3e57b1b2ff39042c67904bdc437602064519f3eb87d3267497bc56cc0b7611faa40e22019991440a8e8e179d4c6a0440e9f226571fce46
-  languageName: node
-  linkType: hard
-
 "make-dir@npm:^3.0.0":
   version: 3.1.0
   resolution: "make-dir@npm:3.1.0"
@@ -10524,7 +10517,6 @@ __metadata:
     jest: ^26.6.3
     lint-staged: ^10.5.4
     lodash: ^4.17.21
-    luxon: ^1.26.0
     marked: ^2.0.3
     mnemonist: ^0.38.3
     multibase: ^4.0.4