Do not declare the agent's Kafka account here

Kafka is administered centrally. An ACL is not a team's decision to make about
itself, so the account moved to k8s-platform/kafka-topology.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

deploy/kafka-account.yaml

@@ -1,42 +0,0 @@
-# This agent's Kafka account.
-#
-# It lives here rather than with the cluster because the account belongs to the
-# consumer, not to the broker: the agent's repo says what the agent may read,
-# and adding or removing the agent adds or removes its access. `infra-kafka`
-# deploys a cluster and holds no opinion about who uses it.
-#
-# The CR itself must be created in the operator's namespace — Strimzi runs with
-# `watchAnyNamespace=false`, so a KafkaUser anywhere else is simply ignored, with
-# no error anywhere.
-#
-# Read on one topic and one consumer-group prefix. It cannot see sales or
-# payments — an agent whose job is stock has no business reading who paid what —
-# and it cannot write, so a compromised workflow can raise no event that another
-# agent would then act on.
-apiVersion: kafka.strimzi.io/v1
-kind: KafkaUser
-metadata:
-  name: classic-models-agent-approvisionnement
-  namespace: kafka
-  labels:
-    strimzi.io/cluster: kafka
-spec:
-  authentication:
-    type: scram-sha-512
-  authorization:
-    type: simple
-    acls:
-      - resource:
-          type: topic
-          name: classic-models.catalog
-          patternType: literal
-        operations:
-          - Read
-          - Describe
-      - resource:
-          type: group
-          name: approvisionnement-
-          patternType: prefix
-        operations:
-          - Read
-          - Describe