Removed inclusion of process.h (not needed and breaks with gcc4).

diff --git a/programs/regedit/listview.c b/programs/regedit/listview.c
index e2aea80..3ccdaea 100644
--- a/programs/regedit/listview.c
+++ b/programs/regedit/listview.c
@@ -23,7 +23,6 @@
 #include <commctrl.h>
 #include <stdlib.h>
 #include <tchar.h>
-#include <process.h>
 #include <stdio.h>
 
 #include "main.h"
diff --git a/programs/regedit/main.c b/programs/regedit/main.c
index 0e2f534..97f38a3 100644
--- a/programs/regedit/main.c
+++ b/programs/regedit/main.c
@@ -23,7 +23,6 @@
 #include <commctrl.h>
 #include <stdlib.h>
 #include <tchar.h>
-#include <process.h>
 #include <stdio.h>
 #include <fcntl.h>
 
diff --git a/programs/regedit/treeview.c b/programs/regedit/treeview.c
index 9e764d0..0c59e3a 100644
--- a/programs/regedit/treeview.c
+++ b/programs/regedit/treeview.c
@@ -26,7 +26,6 @@
 #include <commctrl.h>
 #include <stdlib.h>
 #include <tchar.h>
-#include <process.h>
 #include <stdio.h>
 #include <wine/debug.h>