remove taskcode change, as it fails on mssql and is droped in later changelog anyway

.liquibase/Data_alias/basic/2019.1.4/changelog.xml

@@ -4,8 +4,6 @@
     
     <include relativeToChangelogFile="true" file="update_TaskType_Task.xml"/>
     
-    <include relativeToChangelogFile="true" file="removeTaskCode.xml"/>
-
     <include relativeToChangelogFile="true" file="activity_add_parent.xml"/>
     <include relativeToChangelogFile="true" file="task_add_parent.xml"/>
 

.liquibase/Data_alias/basic/2019.1.4/removeTaskCode.xml

-<?xml version="1.1" encoding="UTF-8" standalone="no"?>
-<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.6.xsd">
-<changeSet author="j.goderbauer" id="598345d1-691b-4cae-b1c0-44c9c48705c8">
-    <dropNotNullConstraint tableName="TASK" columnName="CODE" columnDataType="INTEGER"/>
-    <update tableName="TASK">
-        <column name="CODE"/>
-    </update>
-    <rollback>
-        <addNotNullConstraint tableName="TASK" columnName="CODE" />
-        <!--the update which sets everything to null cannot be rolled back-->
-    </rollback>
-</changeSet>
-</databaseChangeLog>