Remove gc-conductor from checkers

Will revert but will see if this fixes it not working.

Change-Id: I347369700e7f9c4d1bfbab0fc1e0c6edc924b5d0

checkers.yaml

diff --git a/checkers.yaml b/checkers.yaml
index 780fd9b..87280b4 100644
--- a/checkers.yaml
+++ b/checkers.yaml
@@ -146,11 +146,6 @@
     name: "Zuul Check Pipeline"
     description: "Run Zuul jobs on new patchsets"
 
-  - uuid: "zuul-check:plugins_gc-conductor"
-    repository: "plugins/gc-conductor"
-    name: "Zuul Check Pipeline"
-    description: "Run Zuul jobs on new patchsets"
-
   - uuid: "zuul-check:plugins_go-import"
     repository: "plugins/go-import"
     name: "Zuul Check Pipeline"