unused includes (#1133)

* unused includes

Signed-off-by: Rosen Penev <rosenp@gmail.com>

* Use consistent order of includes

Always include in the following order:
- Own header files
- Standard header files
- System header files
- Project header files (toolkit first)

Exceptions:
- cppunit/extensions/HelperMacros.h must be included after
  header files declaring stream operators
- config.h must be included before its definitions are used

---------

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Co-authored-by: Urs Fleisch <ufleisch@users.sourceforge.net>

examples/framelist.cpp

@@ -26,16 +26,12 @@
 #include <cstdlib>
 
 #include "tbytevector.h"
-
 #include "mpegfile.h"
-
 #include "id3v2tag.h"
 #include "id3v2frame.h"
 #include "id3v2header.h"
 #include "commentsframe.h"
-
 #include "id3v1tag.h"
-
 #include "apetag.h"
 
 using namespace std;

examples/strip-id3v1.cpp

@@ -23,8 +23,9 @@
  */
 
 #include <iostream>
-#include "mpegfile.h"
+
 #include "tstring.h"
+#include "mpegfile.h"
 
 using namespace TagLib;
 

examples/tagreader.cpp

@@ -26,9 +26,9 @@
 #include <iomanip>
 #include <cstdio>
 
+#include "tpropertymap.h"
 #include "fileref.h"
 #include "tag.h"
-#include "tpropertymap.h"
 
 using namespace std;
 

examples/tagreader_c.c

@@ -24,6 +24,7 @@
 
 #include <stdio.h>
 #include <string.h>
+
 #include "tag_c.h"
 
 #ifndef FALSE

examples/tagwriter.cpp

@@ -25,17 +25,16 @@
 #include <iostream>
 #include <iomanip>
 #include <cstring>
-
 #include <cstdio>
+#include <cstdlib>
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <cstdlib>
 
 #include "tlist.h"
-#include "fileref.h"
 #include "tfile.h"
-#include "tag.h"
 #include "tpropertymap.h"
+#include "fileref.h"
+#include "tag.h"
 
 using namespace std;