cert-manager: Drop tabitha.biz certificate

This site now obtains its own certificate using Apache _mod_md_.

cert-manager/certificates.yaml

@@ -53,24 +53,6 @@ spec:
     algorithm: ECDSA
     rotationPolicy: Always
 
----
-apiVersion: cert-manager.io/v1
-kind: Certificate
-metadata:
-  name: tabitha-cert
-spec:
-  secretName: tabitha-cert
-  dnsNames:
-  - tabitha.biz
-  - '*.tabitha.biz'
-  issuerRef:
-    group: cert-manager.io
-    kind: ClusterIssuer
-    name: zerossl
-  privateKey:
-    algorithm: ECDSA
-    rotationPolicy: Always
-
 ---
 apiVersion: cert-manager.io/v1
 kind: Certificate