[Kubernetes] Remove redundant dockersock volume mount (#22009) (#22015)

(cherry picked from commit 0d5ef7b)

CHANGELOG.next.asciidoc

@@ -100,6 +100,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Add a switch to the driver definition on SQL module to use pretty names {pull}17378[17378]
 - Fix remote_write flaky test. {pull}21173[21173]
 - Fix panic in kubernetes autodiscover related to keystores {issue}21843[21843] {pull}21880[21880]
+- [Kubernetes] Remove redundant dockersock volume mount {pull}22009[22009]
 
 *Packetbeat*
 

deploy/kubernetes/metricbeat-kubernetes.yaml

@@ -157,8 +157,6 @@ spec:
         - name: modules
           mountPath: /usr/share/metricbeat/modules.d
           readOnly: true
-        - name: dockersock
-          mountPath: /var/run/docker.sock
         - name: proc
           mountPath: /hostfs/proc
           readOnly: true
@@ -172,9 +170,6 @@ spec:
       - name: cgroup
         hostPath:
           path: /sys/fs/cgroup
-      - name: dockersock
-        hostPath:
-          path: /var/run/docker.sock
       - name: config
         configMap:
           defaultMode: 0640

deploy/kubernetes/metricbeat/metricbeat-daemonset.yaml

@@ -64,8 +64,6 @@ spec:
         - name: modules
           mountPath: /usr/share/metricbeat/modules.d
           readOnly: true
-        - name: dockersock
-          mountPath: /var/run/docker.sock
         - name: proc
           mountPath: /hostfs/proc
           readOnly: true
@@ -79,9 +77,6 @@ spec:
       - name: cgroup
         hostPath:
           path: /sys/fs/cgroup
-      - name: dockersock
-        hostPath:
-          path: /var/run/docker.sock
       - name: config
         configMap:
           defaultMode: 0640