[fudash] Remove prebuilders from dashboard.

They are too often red - and those that care can easily find the
statuses on Milo.

Bug: INTK-630 #done
Change-Id: Ib74ca0344d9c7d0aacb57863b099c54dafccf8f9
diff --git a/fudash/main.py b/fudash/main.py
index de6a9be..5980c59 100644
--- a/fudash/main.py
+++ b/fudash/main.py
@@ -51,13 +51,6 @@
         ('fuchsia/zircon-arm64-gcc-qemu_kvm', 'zircon-arm64-gcc-qemu_kvm'),
     ],
     [
-        ('prebuilders'),
-        ('fuchsia/web_view-linux', 'web_view-linux'),
-        ('fuchsia/ffmpeg-linux', 'ffmpeg-linux'),
-        ('fuchsia/jiri-x64-linux', 'jiri-x64-linux'),
-        ('fuchsia/jiri-x64-mac', 'jiri-x64-mac'),
-    ],
-    [
         ('rollers'),
         ('fuchsia/zircon-roller', 'zircon-roller'),
         ('fuchsia/garnet-roller', 'garnet-roller'),