Remove pandoc from expected failures

ci/config.sh

@@ -63,10 +63,9 @@ version="$(ghc_version)"
 commit="$(ghc_commit)"
 echo "Found GHC $version, commit $commit."
 case $version in
-  8.11.*)
-    #       package             ticket
-    broken "pandoc"             18018
-    ;;
+  #8.11.*)
+  #  #       package             ticket
+  #  ;;
 
   *)
     echo "No broken packages for GHC $version"