In AbstractRealMatrix, removed empty abstract method copy() (specified in interface RealMatrix).

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1388296 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/math3/linear/AbstractRealMatrix.java

@@ -73,9 +73,6 @@ public abstract class AbstractRealMatrix
         }
     }
 
-    /** {@inheritDoc} */
-    public abstract RealMatrix copy();
-
     /** {@inheritDoc} */
     public RealMatrix add(RealMatrix m)
         throws MatrixDimensionMismatchException {

src/main/java/org/apache/commons/math3/linear/Array2DRowRealMatrix.java

@@ -145,7 +145,6 @@ public class Array2DRowRealMatrix extends AbstractRealMatrix implements Serializ
     }
 
     /** {@inheritDoc} */
-    @Override
     public RealMatrix copy() {
         return new Array2DRowRealMatrix(copyOut(), false);
     }

src/main/java/org/apache/commons/math3/linear/BlockRealMatrix.java

@@ -271,7 +271,6 @@ public class BlockRealMatrix extends AbstractRealMatrix implements Serializable
     }
 
     /** {@inheritDoc} */
-    @Override
     public BlockRealMatrix copy() {
         // create an empty matrix
         BlockRealMatrix copied = new BlockRealMatrix(rows, columns);

src/main/java/org/apache/commons/math3/linear/OpenMapRealMatrix.java

@@ -69,7 +69,6 @@ public class OpenMapRealMatrix extends AbstractRealMatrix
     }
 
     /** {@inheritDoc} */
-    @Override
     public OpenMapRealMatrix copy() {
         return new OpenMapRealMatrix(this);
     }