Completely disable Melodic jobs. (#223)

Signed-off-by: Chris Lalancette <[email protected]>

index.yaml

@@ -57,21 +57,21 @@ distributions:
 #      uxv8: lunar/release-xenial-arm64-build.yaml
 #    source_builds:
 #      default: lunar/source-build.yaml
-  melodic:
-    doc_builds:
-      default: melodic/doc-build.yaml
-      released-packages-without-doc-job: melodic/doc-released-build.yaml
-    notification_emails:
-    - [email protected]
-    - [email protected]
-    release_builds:
-      default: melodic/release-build.yaml
+#  melodic:
+#    doc_builds:
+#      default: melodic/doc-build.yaml
+#      released-packages-without-doc-job: melodic/doc-released-build.yaml
+#    notification_emails:
+#    - [email protected]
+#    - [email protected]
+#    release_builds:
+#      default: melodic/release-build.yaml
 #      ds: melodic/release-stretch-build.yaml
 #      dsv8: melodic/release-stretch-arm64-build.yaml
-      ubhf: melodic/release-armhf-build.yaml
-      ubv8: melodic/release-arm64-build.yaml
-    source_builds:
-      default: melodic/source-build.yaml
+#      ubhf: melodic/release-armhf-build.yaml
+#      ubv8: melodic/release-arm64-build.yaml
+#    source_builds:
+#      default: melodic/source-build.yaml
 #      ds: melodic/source-stretch-build.yaml
   noetic:
     doc_builds: