HADOOP-13688. Stop bundling HTML source code in javadoc JARs.

(cherry picked from commit 72a2ae6452e615c66d10829da38737896814e02b)

hadoop-hdfs-project/hadoop-hdfs-httpfs/pom.xml

@@ -299,7 +299,6 @@
             </goals>
             <phase>site</phase>
             <configuration>
-              <linksource>true</linksource>
               <quiet>true</quiet>
               <verbose>false</verbose>
               <source>${maven.compile.source}</source>

hadoop-project-dist/pom.xml

@@ -101,7 +101,6 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
-          <linksource>true</linksource>
           <maxmemory>512m</maxmemory>
           <quiet>true</quiet>
           <verbose>false</verbose>

pom.xml

@@ -321,7 +321,6 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
             <id>aggregate</id>
             <configuration>
               <maxmemory>1024m</maxmemory>
-              <linksource>true</linksource>
               <quiet>true</quiet>
               <verbose>false</verbose>
               <source>${maven.compile.source}</source>