Delete unused functions

* java/org/gnu/emacs/EmacsNative.java (dup, close):

* src/android.c (dup, close): Delete functions no longer
referenced.

java/org/gnu/emacs/EmacsNative.java

@@ -36,12 +36,6 @@ public final class EmacsNative
   private static final String[] libraryDeps;
 
 
-  /* Like `dup' in C.  */
-  public static native int dup (int fd);
-
-  /* Like `close' in C.  */
-  public static native int close (int fd);
-
   /* Obtain the fingerprint of this build of Emacs.  The fingerprint
      can be used to determine the dump file name.  */
   public static native String getFingerprint ();