clean code related to xpack plugin install

We don't need this anymore as X-Pack is now already included in elasticsearch since 6.3.

tasks/xpack/elasticsearch-xpack-install.yml

@@ -1,68 +0,0 @@
----
-
-#Test if feature is installed
-- name: Test if x-pack is installed
-  shell: "{{es_home}}/bin/elasticsearch-plugin list | grep x-pack"
-  become: yes
-  register: x_pack_installed
-  changed_when: False
-  failed_when: "'ERROR' in x_pack_installed.stdout"
-  check_mode: no
-  ignore_errors: yes
-  environment:
-    CONF_DIR: "{{ es_conf_dir }}"
-    ES_PATH_CONF: "{{ es_conf_dir }}"
-    ES_INCLUDE: "{{ default_file }}"
-
-
-#Remove X-Pack if installed and its not been requested or the ES version has changed
-- name: Remove x-pack plugin
-  become: yes
-  command: "{{es_home}}/bin/elasticsearch-plugin remove x-pack"
-  register: xpack_state
-  failed_when: "'ERROR' in xpack_state.stdout"
-  changed_when: xpack_state.rc == 0
-  when: x_pack_installed.rc == 0 and (not es_enable_xpack or es_version_changed)
-  notify: restart elasticsearch
-  environment:
-    CONF_DIR: "{{ es_conf_dir }}"
-    ES_PATH_CONF: "{{ es_conf_dir }}"
-    ES_INCLUDE: "{{ default_file }}"
-
-
-#Install plugin if not installed, or the es version has changed (so removed above), and its been requested
-- name: Download x-pack from url
-  get_url: url={{ es_xpack_custom_url }} dest=/tmp/x-pack-{{ es_version }}.zip
-  when: (x_pack_installed.rc == 1 or es_version_changed) and (es_enable_xpack and es_xpack_custom_url is defined)
-
-- name: Install x-pack plugin from local
-  become: yes
-  command: >
-    {{es_home}}/bin/elasticsearch-plugin install --silent --batch file:///tmp/x-pack-{{ es_version }}.zip
-  register: xpack_state
-  changed_when: xpack_state.rc == 0
-  when: (x_pack_installed.rc == 1 or es_version_changed) and (es_enable_xpack and es_xpack_custom_url is defined)
-  notify: restart elasticsearch
-  environment:
-    CONF_DIR: "{{ es_conf_dir }}"
-    ES_PATH_CONF: "{{ es_conf_dir }}"
-    ES_INCLUDE: "{{ default_file }}"
-
-- name: Delete x-pack zip file
-  file: dest=/tmp/x-pack-{{ es_version }}.zip state=absent
-  when: es_xpack_custom_url is defined
-
-- name: Install x-pack plugin from elastic.co
-  become: yes
-  command: >
-    {{es_home}}/bin/elasticsearch-plugin install --silent --batch x-pack
-  register: xpack_state
-  failed_when: "'ERROR' in xpack_state.stdout"
-  changed_when: xpack_state.rc == 0
-  when: (x_pack_installed.rc == 1 or es_version_changed) and (es_enable_xpack and es_xpack_custom_url is not defined)
-  notify: restart elasticsearch
-  environment:
-    CONF_DIR: "{{ es_conf_dir }}"
-    ES_PATH_CONF: "{{ es_conf_dir }}"
-    ES_INCLUDE: "{{ default_file }}"
-    ES_JAVA_OPTS: "{% if es_proxy_host is defined and es_proxy_host != '' %}-Dhttp.proxyHost={{ es_proxy_host }} -Dhttp.proxyPort={{ es_proxy_port }} -Dhttps.proxyHost={{ es_proxy_host }} -Dhttps.proxyPort={{ es_proxy_port }}{% endif %}"

tasks/xpack/elasticsearch-xpack.yml

@@ -3,10 +3,6 @@
 - name: set fact es_version_changed
   set_fact: es_version_changed={{ ((elasticsearch_install_from_package is defined and (debian_elasticsearch_install_from_repo.changed or redhat_elasticsearch_install_from_repo.changed)) or (elasticsearch_install_from_package is defined and elasticsearch_install_from_package.changed)) }}
 
-- name: include elasticsearch-xpack-install.yml
-  include: elasticsearch-xpack-install.yml
-  when: es_install_xpack
-
 #Security configuration
 - name: include security/elasticsearch-security.yml
   include: security/elasticsearch-security.yml