remove plugins versions override
diff --git a/pom.xml b/pom.xml
index 95085ed..e727689 100644
--- a/pom.xml
+++ b/pom.xml
@@ -535,7 +535,6 @@
       <plugin>
         <groupId>org.codehaus.plexus</groupId>
         <artifactId>plexus-component-metadata</artifactId>
-        <version>1.6</version>
         <executions>
           <execution>
             <goals>
@@ -548,7 +547,6 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-shade-plugin</artifactId>
-        <version>1.4</version>
         <executions>
           <execution>
             <phase>package</phase>