Remove setting explicit focus on comment textarea

Using GrComment for patchset level means the editing textarea
automatically takes focus when in editing mode and doesn't
require explicit focus setting.

Release-Notes: skip
Google-bug-id: b/242982372
Change-Id: I551eafd97ac2ad692107c301c9b155a5e019b3de
diff --git a/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts b/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts
index 13de1cd..b1f2019 100644
--- a/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts
+++ b/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts
@@ -1570,10 +1570,7 @@
     if (!section || section === FocusTarget.ANY) {
       section = this.chooseFocusTarget();
     }
-    if (section === FocusTarget.BODY) {
-      const textarea = queryAndAssert<GrTextarea>(this, 'gr-textarea');
-      setTimeout(() => textarea.getNativeTextarea().focus());
-    } else if (section === FocusTarget.REVIEWERS) {
+    if (section === FocusTarget.REVIEWERS) {
       const reviewerEntry = this.reviewersList?.focusStart;
       setTimeout(() => reviewerEntry?.focus());
     } else if (section === FocusTarget.CCS) {