Clean up pom
diff --git a/pom.xml b/pom.xml
index f49a68c..8036fb1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -173,6 +173,7 @@
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-common</artifactId>
       <version>${hadoop-common.version}</version>
+      <scope>provided</scope>
       <optional>true</optional>
       <exclusions>
         <exclusion>
@@ -181,32 +182,6 @@
         </exclusion>
       </exclusions>
     </dependency>
-    <dependency>
-      <groupId>org.apache.hadoop</groupId>
-      <artifactId>hadoop-mapreduce-client-core</artifactId>
-      <version>${hadoop-mapreduce-client-core.version}</version>
-      <optional>true</optional>
-      <exclusions>
-        <exclusion>
-          <groupId>org.glassfish.grizzly</groupId>
-          <artifactId>grizzly-framework</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>org.glassfish.grizzly</groupId>
-          <artifactId>grizzly-rcm</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>com.cenqua.clover</groupId>
-          <artifactId>clover</artifactId>
-        </exclusion>
-      </exclusions>
-    </dependency>
-    <dependency>
-      <groupId>org.apache.hadoop</groupId>
-      <artifactId>hadoop-mapreduce-client-common</artifactId>
-      <version>${hadoop-mapreduce-client-common.version}</version>
-      <optional>true</optional>
-    </dependency>
     <!-- For statistics. Used in p-value calculation. -->
     <dependency>
         <groupId>org.apache.commons</groupId>