[roll] Roll cobalt Remove the last references to a config.yaml file.

We switched to metrics.yaml a long time ago.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt/+/910933
Original-Revision: c39cbba500e9b7137c18475cbf5e4475c5855230
GitOrigin-RevId: 430ca9e93d4d893035fd5aed55210d22e24ad897
Change-Id: I77696a0ce36c309d02ac573d2eb4df5b05a02a45
diff --git a/third_party/flower b/third_party/flower
index 6b5ad60..7ca7bf4 100644
--- a/third_party/flower
+++ b/third_party/flower
@@ -98,7 +98,7 @@
              gitsubmoduleof="fuchsia"
              path="third_party/cobalt"
              remote="https://fuchsia.googlesource.com/cobalt"
-             revision="c38fb5a6824f01c26a65a5674a4f9fff03c10b17"
+             revision="c39cbba500e9b7137c18475cbf5e4475c5855230"
              gerrithost="https://fuchsia-review.googlesource.com"/>
     <project name="cobalt-registry"
              gitsubmoduleof="fuchsia"