Chore: remove redundant version definition as it is inherited from the parent

Author: dbmalkovsky

modules/flowable-bom/pom.xml

@@ -15,7 +15,6 @@
     </description>
     <artifactId>flowable-bom</artifactId>
     <packaging>pom</packaging>
-    <version>8.1.0-SNAPSHOT</version>
 
     <dependencyManagement>
         <dependencies>