Remove mail templates feature as buggy and unused

Gemfile

@@ -46,7 +46,6 @@ gem 'selectize-rails', '0.12.1' # include selectize.js for select
 gem 'kaminari',         '0.16.3'  # pagination
 gem 'coderay',          '1.1.0'   # xml console visualize
 gem 'select2-rails',    '3.5.9.3' # for autocomplete
-gem 'liquid',           '3.0.6'   # for email templates
 
 # rights
 gem 'cancancan', '1.11.0' # autharization

Gemfile.lock

@@ -231,7 +231,6 @@ GEM
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
     libxml-ruby (3.0.0)
-    liquid (3.0.6)
     loofah (2.2.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
@@ -472,7 +471,6 @@ DEPENDENCIES
   jquery-rails (= 4.0.4)
   jquery-ui-rails (= 5.0.5)
   kaminari (= 0.16.3)
-  liquid (= 3.0.6)
   mina (= 0.3.1)
   money-rails
   nokogiri

app/models/ability.rb

@@ -98,7 +98,6 @@ def admin # Admin/admin_user dynamic role
     can :manage, LegalDocument
     can :manage, BankStatement
     can :manage, BankTransaction
-    can :manage, MailTemplate
     can :manage, Invoice
     can :manage, WhiteIp
     can :manage, AccountActivity

app/views/admin/base/_menu.haml

@@ -34,7 +34,6 @@
           %li= link_to t('.zones'), admin_zones_path
           %li= link_to t('.blocked_domains'), admin_blocked_domains_path
           %li= link_to t('.reserved_domains'), admin_reserved_domains_path
-          %li= link_to t(:mail_templates), admin_mail_templates_path
           %li= link_to t('.epp_log'), admin_epp_logs_path(created_after: 'today')
           %li= link_to t('.repp_log'), admin_repp_logs_path(created_after: 'today')
           %li= link_to t('.que'), '/admin/que'

config/locales/en.yml

@@ -660,7 +660,6 @@ en:
   created_at_until: 'Created at until'
   is_registrant: 'Is registrant'
   force_delete_set_on_domain: 'Force delete set on domain %{domain_name}'
-  mail_templates: Mail Templates
   contact_is_not_valid: 'Contact %{value} is not valid, please fix the invalid contact'
   next: 'Next'
   previous: 'Previous'

config/routes.rb

@@ -182,7 +182,6 @@
       end
     end
 
-    resources :mail_templates
     resources :account_activities
 
     resources :bank_statements do

db/migrate/20190506100655_remove_mail_templates.rb

@@ -0,0 +1,5 @@
+class RemoveMailTemplates < ActiveRecord::Migration
+  def change
+    drop_table :mail_templates
+  end
+end

db/structure.sql

@@ -1944,43 +1944,6 @@ CREATE SEQUENCE public.log_white_ips_id_seq
 ALTER SEQUENCE public.log_white_ips_id_seq OWNED BY public.log_white_ips.id;
 
 
---
--- Name: mail_templates; Type: TABLE; Schema: public; Owner: -; Tablespace: 
---
-
-CREATE TABLE public.mail_templates (
-    id integer NOT NULL,
-    name character varying NOT NULL,
-    subject character varying,
-    "from" character varying,
-    bcc character varying,
-    cc character varying,
-    body text NOT NULL,
-    text_body text NOT NULL,
-    created_at timestamp without time zone,
-    updated_at timestamp without time zone
-);
-
-
---
--- Name: mail_templates_id_seq; Type: SEQUENCE; Schema: public; Owner: -
---
-
-CREATE SEQUENCE public.mail_templates_id_seq
-    START WITH 1
-    INCREMENT BY 1
-    NO MINVALUE
-    NO MAXVALUE
-    CACHE 1;
-
-
---
--- Name: mail_templates_id_seq; Type: SEQUENCE OWNED BY; Schema: public; Owner: -
---
-
-ALTER SEQUENCE public.mail_templates_id_seq OWNED BY public.mail_templates.id;
-
-
 --
 -- Name: nameservers; Type: TABLE; Schema: public; Owner: -; Tablespace: 
 --
@@ -2794,13 +2757,6 @@ ALTER TABLE ONLY public.log_users ALTER COLUMN id SET DEFAULT nextval('public.lo
 ALTER TABLE ONLY public.log_white_ips ALTER COLUMN id SET DEFAULT nextval('public.log_white_ips_id_seq'::regclass);
 
 
---
--- Name: id; Type: DEFAULT; Schema: public; Owner: -
---
-
-ALTER TABLE ONLY public.mail_templates ALTER COLUMN id SET DEFAULT nextval('public.mail_templates_id_seq'::regclass);
-
-
 --
 -- Name: id; Type: DEFAULT; Schema: public; Owner: -
 --
@@ -3228,14 +3184,6 @@ ALTER TABLE ONLY public.log_white_ips
     ADD CONSTRAINT log_white_ips_pkey PRIMARY KEY (id);
 
 
---
--- Name: mail_templates_pkey; Type: CONSTRAINT; Schema: public; Owner: -; Tablespace: 
---
-
-ALTER TABLE ONLY public.mail_templates
-    ADD CONSTRAINT mail_templates_pkey PRIMARY KEY (id);
-
-
 --
 -- Name: nameservers_pkey; Type: CONSTRAINT; Schema: public; Owner: -; Tablespace: 
 --
@@ -4945,6 +4893,8 @@ INSERT INTO schema_migrations (version) VALUES ('20190328151838');
 
 INSERT INTO schema_migrations (version) VALUES ('20190415120246');
 
+INSERT INTO schema_migrations (version) VALUES ('20190506100655');
+
 INSERT INTO schema_migrations (version) VALUES ('20190510090240');
 
 INSERT INTO schema_migrations (version) VALUES ('20190510102549');