Revert "Update for 13.15.0-rc1"

This reverts commit 552cf009c0.

Change-Id: Ie345bea481261b761c44079e9472622040fda302

contrib/realtime/mysql/mysql_cdr.sql

@@ -1,32 +0,0 @@
-CREATE TABLE alembic_version (
-    version_num VARCHAR(32) NOT NULL
-);
-
--- Running upgrade  -> 210693f3123d
-
-CREATE TABLE cdr (
-    accountcode VARCHAR(20), 
-    src VARCHAR(80), 
-    dst VARCHAR(80), 
-    dcontext VARCHAR(80), 
-    clid VARCHAR(80), 
-    channel VARCHAR(80), 
-    dstchannel VARCHAR(80), 
-    lastapp VARCHAR(80), 
-    lastdata VARCHAR(80), 
-    start DATETIME, 
-    answer DATETIME, 
-    end DATETIME, 
-    duration INTEGER, 
-    billsec INTEGER, 
-    disposition VARCHAR(45), 
-    amaflags VARCHAR(45), 
-    userfield VARCHAR(256), 
-    uniqueid VARCHAR(150), 
-    linkedid VARCHAR(150), 
-    peeraccount VARCHAR(20), 
-    sequence INTEGER
-);
-
-INSERT INTO alembic_version (version_num) VALUES ('210693f3123d');
-