otafault: Clean up header inclusion.

Remove unneeded #includes. Also remove unneeded dependency on libz and
libselinux.

Test: mmma bootable/recovery
Change-Id: Ic8f7f46f4b89762dee384921504489de75320ac0
diff --git a/otafault/config.cpp b/otafault/config.cpp
index b94e429..c11f774 100644
--- a/otafault/config.cpp
+++ b/otafault/config.cpp
@@ -14,16 +14,14 @@
  * limitations under the License.
  */
 
+#include "config.h"
+
 #include <map>
 #include <string>
 
-#include <stdio.h>
-#include <unistd.h>
-
 #include <android-base/stringprintf.h>
 #include <ziparchive/zip_archive.h>
 
-#include "config.h"
 #include "ota_io.h"
 
 #define OTAIO_MAX_FNAME_SIZE 128