[perf] Fix sidebar

Change-Id: I963b920f8f948028136fef8e547e2587948404b3
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/301820
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
diff --git a/perf/modules/perf-scaffold-sk/perf-scaffold-sk.scss b/perf/modules/perf-scaffold-sk/perf-scaffold-sk.scss
index 64e4f50..718ed5b 100644
--- a/perf/modules/perf-scaffold-sk/perf-scaffold-sk.scss
+++ b/perf/modules/perf-scaffold-sk/perf-scaffold-sk.scss
@@ -5,7 +5,12 @@
   grid-template-areas:
     'topbar'
     'main';
+
   grid-template-columns: 100%;
+
+  #sidebar {
+    display: none;
+  }
 }
 
 perf-scaffold-sk {