Remove superfluous HAVE_GD_BUNDLED checks

If we're compiling the bundled libgd, `HAVE_GD_BUNDLED` is set, so
there is no need to check for this macro again.

Author: cmb69

ext/gd/libgd/gd_color_match.c

@@ -1,10 +1,5 @@
-#if HAVE_GD_BUNDLED
-# include "gd.h"
-# include "gdhelpers.h"
-#else
-# include <gd.h>
-# include "libgd/gdhelpers.h"
-#endif
+#include "gd.h"
+#include "gdhelpers.h"
 
 #include "gd_intern.h"
 #include "php.h"

ext/gd/libgd/gd_filter.c

@@ -1,8 +1,4 @@
-#if HAVE_GD_BUNDLED
-# include "gd.h"
-#else
-# include <gd.h>
-#endif
+#include "gd.h"
 
 #include "gd_intern.h"
 

ext/gd/libgd/gd_rotate.c

@@ -1,8 +1,4 @@
-#if HAVE_GD_BUNDLED
-# include "gd.h"
-#else
-# include <gd.h>
-#endif
+#include "gd.h"
 
 #include "gd_intern.h"
 #include <math.h>