[CORAL] Adjust feedback log wording

For the current feedback UI, it is more natural to directly display the
json in the grouping log section.

Bug: b:387932120
Test: CQ
Change-Id: I4469e3ecbc50a5c4881c4a7ea13bb5fa5eaa817d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6248616
Reviewed-by: Xiaodan Zhu <zxdan@chromium.org>
Commit-Queue: Xiaodan Zhu <zxdan@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1418708}

ash/wm/overview/birch/birch_bar_controller.cc

@@ -253,11 +253,8 @@ void BirchBarController::ProvideFeedbackForCoral() {
   }
   Shell::Get()->coral_controller()->OpenFeedbackDialog(
       /*group_description=*/
-      base::StrCat({kUserFeedbackPrompt, kMarkdownBackticks, "json\n",
-                    base::WriteJsonWithOptions(
-                        root, base::JSONWriter::OPTIONS_PRETTY_PRINT)
-                        .value_or(std::string()),
-                    "\n", kMarkdownBackticks}));
+      base::WriteJsonWithOptions(root, base::JSONWriter::OPTIONS_PRETTY_PRINT)
+          .value_or(std::string()));
 }
 
 void BirchBarController::ExecuteMenuCommand(int command_id, bool from_chip) {

ash/wm/overview/birch/birch_bar_controller.h

@@ -23,11 +23,6 @@ class PrefRegistrySimple;
 
 namespace ash {
 
-inline constexpr char kUserFeedbackPrompt[] =
-    "Auto-generated logs:\n";
-
-inline constexpr char kMarkdownBackticks[] = "```";
-
 class BirchBarMenuModelAdapter;
 class BirchBarView;
 class BirchChipButton;