Removed unused field and import

git-svn-id: https://svn.apache.org/repos/asf/directmemory/lightning/trunk@1398076 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lightning-maven-plugin/src/main/java/org/apache/directmemory/lightning/maven/LightningGeneratorMojo.java b/lightning-maven-plugin/src/main/java/org/apache/directmemory/lightning/maven/LightningGeneratorMojo.java
index cb24af4..1e42c7a 100644
--- a/lightning-maven-plugin/src/main/java/org/apache/directmemory/lightning/maven/LightningGeneratorMojo.java
+++ b/lightning-maven-plugin/src/main/java/org/apache/directmemory/lightning/maven/LightningGeneratorMojo.java
@@ -37,7 +37,6 @@
 import org.apache.directmemory.lightning.configuration.SerializerDefinition;
 import org.apache.directmemory.lightning.logging.LogLevel;
 import org.apache.directmemory.lightning.logging.Logger;
-import org.apache.maven.execution.MavenSession;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.codehaus.plexus.compiler.util.scan.SimpleSourceInclusionScanner;
 import org.codehaus.plexus.compiler.util.scan.SourceInclusionScanner;
@@ -61,15 +60,6 @@
 {
 
     /**
-     * The current build session instance. This is used for toolchain manager API calls.
-     * 
-     * @parameter default-value="${session}"
-     * @required
-     * @readonly
-     */
-    private MavenSession session;
-
-    /**
      * The java generated-source directory.
      * 
      * @parameter default-value= "${project.build.directory}/generated-sources/lightning"