improve arthas-vmtool package jar config

arthas-vmtool/pom.xml

@@ -64,7 +64,6 @@
     </profiles>
 
     <build>
-        <finalName>arthas-vmtool</finalName>
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -81,19 +80,6 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
                 <version>2.4</version>
-                <executions>
-                    <execution>
-                        <id>default-jar</id>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>jar</goal>
-                        </goals>
-                        <configuration>
-                            <classifier>${os_name}-${os.arch}</classifier>
-                            <classesDirectory>${project.build.directory}/classes</classesDirectory>
-                        </configuration>
-                    </execution>
-                </executions>
             </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>