build: remove the edgefs operator from rook

The EdgeFS operator has been deprecated for some time in Rook.
If the replacement is added back to Rook it can be completed
according to the new guidelines in the documentation.
https://rook.io/docs/rook/master/storage-providers.html

Signed-off-by: Travis Nielsen <tnielsen@redhat.com>

build/codegen/codegen.sh

@@ -18,7 +18,7 @@
 # Disables quote checks, which is needed because of the SED variable here.
 
 KUBE_CODE_GEN_VERSION="kubernetes-1.17.2"
-GROUP_VERSIONS="rook.io:v1 rook.io:v1alpha2 ceph.rook.io:v1 nfs.rook.io:v1alpha1 cassandra.rook.io:v1alpha1 edgefs.rook.io:v1 yugabytedb.rook.io:v1alpha1"
+GROUP_VERSIONS="rook.io:v1 rook.io:v1alpha2 ceph.rook.io:v1 nfs.rook.io:v1alpha1 cassandra.rook.io:v1alpha1 yugabytedb.rook.io:v1alpha1"
 
 scriptdir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 codegendir="${scriptdir}/../../vendor/k8s.io/code-generator"