Fix redundant Javadoc phrasing

Author: garydgregory

src/main/java/org/apache/commons/codec/net/URLCodec.java

@@ -359,7 +359,7 @@ public String getDefaultCharset() {
     /**
      * The {@code String} encoding used for decoding and encoding.
      *
-     * @return Returns the encoding.
+     * @return the encoding.
      * @deprecated Use {@link #getDefaultCharset()}, will be removed in 2.0.
      */
     @Deprecated

src/test/java/org/apache/commons/codec/binary/Base16Test.java

@@ -44,7 +44,7 @@ public class Base16Test {
     private final Random random = new Random();
 
     /**
-     * @return Returns the random.
+     * @return the random.
      */
     public Random getRandom() {
         return this.random;

src/test/java/org/apache/commons/codec/binary/Base64Test.java

@@ -133,7 +133,7 @@ private static void assertBase64DecodingOfTrailingBits(final int nbits) {
     private final Random random = new Random();
 
     /**
-     * @return Returns the random.
+     * @return the random.
      */
     public Random getRandom() {
         return this.random;