Tests break with new assert

Author: schmidt-sebastian

packages/firestore/src/local/indexeddb_remote_document_cache.ts

@@ -499,6 +499,7 @@ class IndexedDbRemoteDocumentChangeBuffer extends RemoteDocumentChangeBuffer {
       } else {
         sizeDelta -= previousSize!;
         if (this.trackRemovals) {
+          debugAssert(!documentChange.readTime.isEqual(SnapshotVersion.min()), "All read times must be set for trackRemovals");
           // In order to track removals, we store a "sentinel delete" in the
           // RemoteDocumentCache. This entry is represented by a NoDocument
           // with a version of 0 and ignored by `maybeDecodeDocument()` but