Merge pull request #30712 from Expensify/revert-29860-27456-green-line

[CP Staging] Revert "27456 Chat - The green line is displayed chaotically at the recipient"

(cherry picked from commit e108378)

src/pages/home/report/ReportActionsList.js

@@ -303,12 +303,9 @@ function ReportActionsList({
             if (!currentUnreadMarker) {
                 const nextMessage = sortedReportActions[index + 1];
                 const isCurrentMessageUnread = isMessageUnread(reportAction, report.lastReadTime);
-                const isNextMessageRead = !isMessageUnread(nextMessage, report.lastReadTime);
-                const isWithinVisibleThreshold = scrollingVerticalOffset.current < MSG_VISIBLE_THRESHOLD ? reportAction.created < userActiveSince.current : true;
-                shouldDisplay = isCurrentMessageUnread && (!nextMessage || isNextMessageRead) && isWithinVisibleThreshold;
-
-                if (shouldDisplay && !messageManuallyMarkedUnread) {
-                    shouldDisplay = reportAction.actorAccountID !== Report.getCurrentUserAccountID();
+                shouldDisplay = isCurrentMessageUnread && (!nextMessage || !isMessageUnread(nextMessage, report.lastReadTime));
+                if (!messageManuallyMarkedUnread) {
+                    shouldDisplay = shouldDisplay && reportAction.actorAccountID !== Report.getCurrentUserAccountID();
                 }
             } else {
                 shouldDisplay = reportAction.reportActionID === currentUnreadMarker;