Update release notes for v25.4-v25.4.1

Author: Automated Release Bot

src/current/_data/releases.yml

@@ -9991,38 +9991,3 @@
       CockroachDB Cloud clusters. To request to upgrade
       a CockroachDB self-hosted cluster to this version,
       [contact support](https://support.cockroachlabs.com/hc/requests/new).
-
-
-- release_name: v25.4.1
-  major_version: v25.4
-  release_date: '2025-12-02'
-  release_type: Production
-  go_version: go1.25.3
-  sha: 60d802bd0bcb2c1aa81a4b5fd73fb4aa13bb5114
-  has_sql_only: true
-  has_sha256sum: true
-  mac:
-    mac_arm: true
-    mac_arm_experimental: true
-    mac_arm_limited_access: false
-  windows: true
-  linux:
-    linux_arm: true
-    linux_arm_experimental: false
-    linux_arm_limited_access: false
-    linux_intel_fips: true
-    linux_arm_fips: false
-  docker:
-    docker_image: cockroachdb/cockroach
-    docker_arm: true
-    docker_arm_experimental: false
-    docker_arm_limited_access: false
-  source: true
-  previous_release: v25.4.0
-  cloud_only: true
-  cloud_only_message_short: 'Available only for select CockroachDB Cloud clusters'
-  cloud_only_message: >
-      This version is currently available only for select
-      CockroachDB Cloud clusters. To request to upgrade
-      a CockroachDB self-hosted cluster to this version,
-      [contact support](https://support.cockroachlabs.com/hc/requests/new).