Removed Coberta plugin causing site build to fail on JDK 1.4.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/dbcp/trunk@894206 13f79535-47bb-0310-9956-ffa450edef68

Author: psteitz

pom-1.3.xml

@@ -319,11 +319,6 @@
             <excludeFilterFile>${basedir}/findbugs-exclude-filter.xml</excludeFilterFile>
           </configuration>
         </plugin>
-        <plugin>
-          <groupId>org.codehaus.mojo</groupId>
-          <artifactId>cobertura-maven-plugin</artifactId>
-          <version>2.3</version>
-        </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-javadoc-plugin</artifactId>