Index: branches/version-2_12-dev/html/install/sql/drop_table.sql
===================================================================
--- branches/version-2_12-dev/html/install/sql/drop_table.sql	(revision 21502)
+++ branches/version-2_12-dev/html/install/sql/drop_table.sql	(revision 21701)
@@ -73,5 +73,4 @@
 DROP TABLE mtb_conveni_message;
 DROP TABLE mtb_constants;
-DROP TABLE mtb_class;
 DROP TABLE mtb_authority;
 DROP TABLE mtb_allowed_tag;
Index: branches/version-2_12-dev/html/install/sql/insert_data.sql
===================================================================
--- branches/version-2_12-dev/html/install/sql/insert_data.sql	(revision 21699)
+++ branches/version-2_12-dev/html/install/sql/insert_data.sql	(revision 21701)
@@ -766,7 +766,4 @@
 INSERT INTO mtb_auth_excludes (id, name, rank) VALUES (0, 'index.php', 0);
 INSERT INTO mtb_auth_excludes (id, name, rank) VALUES (1, 'logout.php', 1);
-
-INSERT INTO mtb_class (id, name, rank) VALUES (1, '規格無し', 0);
-INSERT INTO mtb_class (id, name, rank) VALUES (2, '規格有り', 1);
 
 INSERT INTO mtb_db (id, name, rank) VALUES (1, 'PostgreSQL', 0);
Index: branches/version-2_12-dev/html/install/sql/create_table_mysql.sql
===================================================================
--- branches/version-2_12-dev/html/install/sql/create_table_mysql.sql	(revision 21653)
+++ branches/version-2_12-dev/html/install/sql/create_table_mysql.sql	(revision 21701)
@@ -866,11 +866,4 @@
 );
 
-CREATE TABLE mtb_class (
-    id smallint,
-    name text,
-    rank smallint NOT NULL DEFAULT 0,
-    PRIMARY KEY (id)
-);
-
 CREATE TABLE mtb_status (
     id smallint,
Index: branches/version-2_12-dev/html/install/sql/create_table_pgsql.sql
===================================================================
--- branches/version-2_12-dev/html/install/sql/create_table_pgsql.sql	(revision 21676)
+++ branches/version-2_12-dev/html/install/sql/create_table_pgsql.sql	(revision 21701)
@@ -868,11 +868,4 @@
 );
 
-CREATE TABLE mtb_class (
-    id smallint,
-    name text,
-    rank smallint NOT NULL DEFAULT 0,
-    PRIMARY KEY (id)
-);
-
 CREATE TABLE mtb_status (
     id smallint,