diff --git a/lib/tasks/zonefile.rake b/lib/tasks/zonefile.rake
deleted file mode 100644
index f402528be..000000000
--- a/lib/tasks/zonefile.rake
+++ /dev/null
@@ -1,125 +0,0 @@
-namespace :zonefile do
-  desc 'Replace procedure'
-  task replace_procedure: :environment do
-    ActiveRecord::Base.connection.execute <<-SQL
-      CREATE OR REPLACE FUNCTION generate_zonefile(i_origin varchar)
-      RETURNS text AS $$
-      DECLARE
-        zone_header text := concat('$ORIGIN ', i_origin, '.');
-        serial_num varchar;
-        include_filter varchar := '';
-        exclude_filter varchar := '';
-        tmp_var text;
-        ret text;
-      BEGIN
-        -- define filters
-        include_filter = '%.' || i_origin;
-
-        -- for %.%.%
-        IF i_origin ~ '\\.' THEN
-          exclude_filter := '';
-        -- for %.%
-        ELSE
-          exclude_filter := '%.%.' || i_origin;
-        END IF;
-
-        SELECT (extract(epoch from now() at time zone 'utc'))::int INTO serial_num;
-
-        -- zonefile header
-        SELECT concat(
-          format('%-10s', '$ORIGIN .'), chr(10),
-          format('%-10s', '$TTL'), zf.ttl, chr(10), chr(10),
-          format('%-10s', i_origin || '.'), 'IN SOA ', zf.master_nameserver, '. ', zf.email, '. (', chr(10),
-          format('%-17s', ''), format('%-12s', serial_num), '; serial number', chr(10),
-          format('%-17s', ''), format('%-12s', zf.refresh), '; refresh, seconds', chr(10),
-          format('%-17s', ''), format('%-12s', zf.retry), '; retry, seconds', chr(10),
-          format('%-17s', ''), format('%-12s', zf.expire), '; expire, seconds', chr(10),
-          format('%-17s', ''), format('%-12s', zf.minimum_ttl), '; minimum TTL, seconds', chr(10),
-          format('%-17s', ''), ')'
-        ) FROM zonefile_settings zf WHERE i_origin = zf.origin INTO tmp_var;
-
-        ret = concat(tmp_var, chr(10), chr(10));
-
-        -- origin ns records
-        SELECT ns_records FROM zonefile_settings zf WHERE i_origin = zf.origin INTO tmp_var;
-        ret := concat(ret, '; Zone NS Records', chr(10), tmp_var, chr(10));
-
-        -- ns records
-        SELECT array_to_string(
-          array(
-            SELECT concat(d.name_puny, '. IN NS ', ns.hostname, '.')
-            FROM domains d
-            JOIN nameservers ns ON ns.domain_id = d.id
-            WHERE d.name LIKE include_filter AND d.name NOT LIKE exclude_filter
-            AND NOT ('{serverHold,clientHold}' && d.statuses)
-            ORDER BY d.name
-          ),
-          chr(10)
-        ) INTO tmp_var;
-
-        ret := concat(ret, tmp_var, chr(10), chr(10));
-
-        -- origin a glue records
-        SELECT a_records FROM zonefile_settings zf WHERE i_origin = zf.origin INTO tmp_var;
-        ret := concat(ret, '; Zone A Records', chr(10), tmp_var, chr(10));
-
-        -- a glue records for other nameservers
-        SELECT array_to_string(
-          array(
-            SELECT concat(ns.hostname, '. IN A ', unnest(ns.ipv4))
-            FROM nameservers ns
-            JOIN domains d ON d.id = ns.domain_id
-            WHERE d.name LIKE include_filter AND d.name NOT LIKE exclude_filter
-            AND ns.hostname LIKE '%.' || d.name
-            AND d.name <> i_origin
-            AND ns.ipv4 IS NOT NULL AND ns.ipv4 <> '{}'
-            AND NOT ('{serverHold,clientHold}' && d.statuses)
-          ), chr(10)
-        ) INTO tmp_var;
-
-        ret := concat(ret, tmp_var, chr(10), chr(10));
-
-        -- origin aaaa glue records
-        SELECT a4_records FROM zonefile_settings zf WHERE i_origin = zf.origin INTO tmp_var;
-        ret := concat(ret, '; Zone AAAA Records', chr(10), tmp_var, chr(10));
-
-        -- aaaa glue records for other nameservers
-        SELECT array_to_string(
-          array(
-            SELECT concat(ns.hostname, '. IN AAAA ', unnest(ns.ipv6))
-            FROM nameservers ns
-            JOIN domains d ON d.id = ns.domain_id
-            WHERE d.name LIKE include_filter AND d.name NOT LIKE exclude_filter
-            AND ns.hostname LIKE '%.' || d.name
-            AND d.name <> i_origin
-            AND ns.ipv6 IS NOT NULL AND ns.ipv6 <> '{}'
-            AND NOT ('{serverHold,clientHold}' && d.statuses)
-          ), chr(10)
-        ) INTO tmp_var;
-
-        ret := concat(ret, tmp_var, chr(10), chr(10));
-
-        -- ds records
-        SELECT array_to_string(
-          array(
-            SELECT concat(
-              d.name_puny, '. 3600 IN DS ', dk.ds_key_tag, ' ',
-              dk.ds_alg, ' ', dk.ds_digest_type, ' ', dk.ds_digest
-            )
-            FROM domains d
-            JOIN dnskeys dk ON dk.domain_id = d.id
-            WHERE d.name LIKE include_filter AND d.name NOT LIKE exclude_filter AND dk.flags = 257
-            AND NOT ('{serverHold,clientHold}' && d.statuses)
-            ),
-          chr(10)
-        ) INTO tmp_var;
-
-        ret := concat(ret, '; Zone DS Records', chr(10), tmp_var, chr(10));
-
-        RETURN ret;
-      END;
-      $$
-      LANGUAGE plpgsql;
-    SQL
-  end
-end