Remove Prometheus v1 image

Following deprecation in Wallaby cycle, it's now time to remove it.

Change-Id: I551b99e9bd5224433bd0ebc64e07f0ce83595ef8

docker/prometheus/prometheus-server/Dockerfile.j2

@@ -1,23 +0,0 @@
-FROM {{ namespace }}/{{ infra_image_prefix }}prometheus-base:{{ tag }}
-{% block labels %}
-LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
-{% endblock %}
-
-{% block prometheus_server_header %}{% endblock %}
-
-{% block prometheus_server_repository_version %}
-ENV prometheus_version=1.8.2
-{% endblock %}
-
-{% block prometheus_server_install %}
-RUN curl -o /tmp/prometheus.tar.gz https://github.com/prometheus/prometheus/releases/download/v${prometheus_version}/prometheus-${prometheus_version}.linux-{{debian_arch}}.tar.gz \
-    && tar xvf /tmp/prometheus.tar.gz -C /opt/ \
-    && rm -f /tmp/prometheus.tar.gz \
-    && ln -s /opt/prometheus* /opt/prometheus \
-    && mkdir -p /etc/prometheus /data
-{% endblock %}
-
-{% block prometheus_server_footer %}{% endblock %}
-{% block footer %}{% endblock %}
-
-USER prometheus

releasenotes/notes/remove-prometheus-v1-3bc458bed2228a9e.yaml

@@ -0,0 +1,4 @@
+---
+upgrade:
+  - |
+    Prometheus v1 image has been removed.