Revert "feat(gotify): put the Gotify UI behind ZITADEL single sign-on"

This reverts commit 03cebb0aeb.

k8s/argocd/secrets/gotify-oauth2-proxy-secrets.enc.yaml

@@ -1,30 +0,0 @@
-apiVersion: v1
-kind: Secret
-metadata:
-    name: gotify-oauth2-proxy
-    namespace: notifications
-type: Opaque
-data:
-    client-id: ENC[AES256_GCM,data:Q+XQAR6cfHKoiuxhPZs6khTvqT0A/JG6,iv:LqhfuhXOYPVB6FQpPpERzWRQ+nxgxHZo4qdJO/g52y8=,tag:V2eK2fyscQKmM3/MmDnNtg==,type:str]
-    client-secret: ENC[AES256_GCM,data:P7F+83CLDhHnTN+Qx3SeCFbCjVH4JHb2rSteCr3Dywcb1ysMSNvC+3HyBXzsfJJ/EErUrCPWuwlRmV5ySts1oIrWhKyWMJxNrUTzv4eoclat4RyV6SaNDg==,iv:ESO1OUIqZbZPEVUuHrqjskA4tuTX/sc5m+K6Eo319kI=,tag:2isdxjFbtosov88FHZdeaQ==,type:str]
-    cookie-secret: ENC[AES256_GCM,data:WoWiANSdju+Ep5MuZQNeT0BQdKf5cFvrDUZpe+4B0VeUmQqnvblFi3dciJOeBFom9xYYzUCAI2tUSmX+a6tdAObyoGvjdFmLh+WTfw==,iv:41gYYRkyDIqC3GPuZkoob81Wl2njFTY07j4Puzaq0s4=,tag:x6z33zZnFwvmWUQIVPcxdQ==,type:str]
-sops:
-    kms: []
-    gcp_kms: []
-    azure_kv: []
-    hc_vault: []
-    age:
-        - recipient: age1e5fq3hwxy78psus2nfvmtmua36g0u3suk78ephw6246l974d2utsvn0hla
-          enc: |
-            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB2UURWblY4aTBOQjFSNDRL
-            YkRXVjVHK1QvYW1iR2o0UWVmdE94c2lkWDJjCnlXK1k3cnZBNEExbDU3eDhQZ3FT
-            TVcyckFiWHdRSjZHQ201Nnl6UFdTN28KLS0tIExQeE90VnM1WHRCYkpycjJtR0ht
-            ZHFDNWhKeENSQzljZUNmdktDYWloUDQK/fOG8AjTb2TNqLbqNfArOs0mzInYNJVd
-            iaYxnjH6AjhbLKdnmCpecTQpgx8GeFGIkefV/x5pgrdSUwn0lcvpSQ==
-            -----END AGE ENCRYPTED FILE-----
-    lastmodified: "2026-10-27T19:05:35Z"
-    mac: ENC[AES256_GCM,data:KZV3JNebQ+DbZZZ+e3fvtOGckwC9fmkIchh8DBJ0DMq9lbrPEhP4Juordmnrrs9vJvGxuFJ/KwUv9EELqBsuSy8c47+z7flEAXJiJCJkvVPL/jMidABsFqMALvNNrCqBPWvMHLZUj762DwxB2gKhSx3GLfRUXhm+ZiNcD+39EVw=,iv:ifUlEq/GhBc/QomJApkCaWc3f4ggXoLsvqjzZElO0fU=,tag:fMo+HBDUZdRXgfck+8AJbA==,type:str]
-    pgp: []
-    encrypted_regex: ^(data|stringData)$
-    version: 3.9.3

k8s/argocd/secrets/secret-generator.yaml

@@ -36,7 +36,6 @@ files:
     - etcd-defrag-creds.enc.yaml
     - zitadel-masterkey.enc.yaml
     - smtp-gotify-secrets.enc.yaml
-    - gotify-oauth2-proxy-secrets.enc.yaml
     # Login UI RSA keypair, adopted from the chart-generated Secret so ArgoCD
     # owns it. Without this, the chart re-generates the keypair on every render,
     # which changes checksum/secret-login-service-key and leaves both Zitadel