ENH: Remove unnecessary/unused include statements

Remove unnecessary/unused include statements.

Author: jhlegarreta

Modules/IO/GDCM/test/itkGDCMImageReadSeriesWriteTest.cxx

@@ -24,7 +24,6 @@
 #include "itkRescaleIntensityImageFilter.h"
 #include "itkTestingMacros.h"
 #include "itkGDCMImageIO.h"
-#include "itkGDCMSeriesFileNames.h"
 
 int
 itkGDCMImageReadSeriesWriteTest(int argc, char * argv[])

Modules/IO/XML/test/itkDOMTest1.cxx

@@ -21,11 +21,8 @@ This program tests operations on a DOM node.
 */
 
 #include "itkDOMNode.h"
-#include "itkDOMNodeXMLReader.h"
-#include "itkDOMNodeXMLWriter.h"
 
 #include <iostream>
-#include "itkMacro.h"
 
 int
 itkDOMTest1(int, char *[])

Modules/IO/XML/test/itkDOMTest2.cxx

@@ -29,7 +29,6 @@ It also demonstrates
 #include "itkDOMNodeXMLWriter.h"
 
 #include <iostream>
-#include "itkMacro.h"
 #include "itkTestingMacros.h"
 
 int