Skip unreviewed-snapshot warning when no reviewer is set

mac/Sources/Byre/MergeDialog.swift

@@ -110,7 +110,12 @@ func confirmMerge(_ taskId: String, _ store: Store, _ overlays: Overlays, keepOp
 
 @MainActor
 private func reviewWarnings(_ taskId: String, _ f: MergeFacts, _ store: Store, _ leave: @escaping Leave) -> [MergeWarning] {
+    let task = store.findTask(taskId)
+    let reviewing = !(store.projects.first { $0.id == task?.projectId }?.reviewWorkflow.isEmpty ?? true)
     if f.reviewSnapshot == 0 {
+        if !reviewing {
+            return []
+        }
         return [MergeWarning(text: "These changes haven't been reviewed")]
     }
     var items: [MergeWarning] = []
@@ -119,7 +124,7 @@ private func reviewWarnings(_ taskId: String, _ f: MergeFacts, _ store: Store, _
             store.jumpTo(taskId, .review(f.reviewSnapshot))
         }
     }
-    if f.reviewCount == 0 {
+    if f.reviewCount == 0 && reviewing {
         items.append(MergeWarning(text: "The latest snapshot hasn't been reviewed", open: open))
     }
     if f.reviewRunning {
@@ -131,7 +136,7 @@ private func reviewWarnings(_ taskId: String, _ f: MergeFacts, _ store: Store, _
     if f.reviewFindings > 0 {
         items.append(MergeWarning(text: "The review of the latest snapshot has \(f.reviewFindings) open finding\(f.reviewFindings == 1 ? "" : "s")", open: open))
     }
-    if f.unreviewedChanges {
+    if f.unreviewedChanges && reviewing {
         items.append(MergeWarning(text: "Changes since the last snapshot haven't been reviewed"))
     }
     return items