unconditionally disable the octave_allocator class * configure.ac: Delete the --enable-octave-allocator option. * oct-alloc.h: Delete octave_allocator class. Warn if file is included. Unconditionally define macros to be empty. * NEWS: Make note of these changes. * oct-alloc.cc: Delete. * liboctave/util/module.mk (UTIL_SRC): Remove it from the list. * make_int.cc, Cell.h, oct-obj.cc, oct-obj.h, audiodevinfo.cc, ov-base-int.h, ov-base-scalar.h, ov-bool-mat.cc, ov-bool-mat.h, ov-bool-sparse.cc, ov-bool-sparse.h, ov-bool.cc, ov-bool.h, ov-builtin.cc, ov-builtin.h, ov-cell.cc, ov-cell.h, ov-ch-mat.h, ov-class.cc, ov-class.h, ov-classdef.cc, ov-classdef.h, ov-complex.cc, ov-complex.h, ov-cs-list.cc, ov-cs-list.h, ov-cx-diag.cc, ov-cx-diag.h, ov-cx-mat.cc, ov-cx-mat.h, ov-cx-sparse.cc, ov-cx-sparse.h, ov-dld-fcn.cc, ov-dld-fcn.h, ov-fcn-handle.cc, ov-fcn-handle.h, ov-fcn-inline.cc, ov-fcn-inline.h, ov-fcn.cc, ov-fcn.h, ov-float.cc, ov-float.h, ov-flt-complex.cc, ov-flt-complex.h, ov-flt-cx-diag.cc, ov-flt-cx-diag.h, ov-flt-cx-mat.cc, ov-flt-cx-mat.h, ov-flt-re-diag.cc, ov-flt-re-diag.h, ov-flt-re-mat.cc, ov-flt-re-mat.h, ov-int16.cc, ov-int32.cc, ov-int64.cc, ov-int8.cc, ov-intx.h, ov-java.cc, ov-java.h, ov-mex-fcn.cc, ov-mex-fcn.h, ov-perm.cc, ov-perm.h, ov-range.cc, ov-range.h, ov-re-diag.cc, ov-re-diag.h, ov-re-mat.cc, ov-re-mat.h, ov-re-sparse.cc, ov-re-sparse.h, ov-scalar.cc, ov-scalar.h, ov-str-mat.cc, ov-str-mat.h, ov-struct.cc, ov-struct.h, ov-uint16.cc, ov-uint32.cc, ov-uint64.cc, ov-uint8.cc, ov-usr-fcn.cc, ov-usr-fcn.h, ov.cc, ov.h, pt-const.cc, pt-const.h, idx-vector.cc, idx-vector.h: Delete uses of oct-alloc.h and OCTAVE_ALLOCATOR macros.

--- a/NEWS
+++ b/NEWS
@@ -205,6 +205,13 @@
  ** The warning ID Octave:singular-matrix-div has been replaced by
     Octave:nearly-singular-matrix and Octave:singular-matrix.
 
+ ** The configure option --enable-octave-allocator has been removed.
+    The internal class <octave_allocator> declared in oct-alloc.h has
+    been removed.  The header remains, but is deprecated.  The macros to
+    access the class (DECLARE_OCTAVE_ALLOCATOR, DEFINE_OCTAVE_ALLOCATOR,
+    and DEFINE_OCTAVE_ALLOCATOR2) are now unconditionally defined to be
+    empty.
+
 Summary of important user-visible changes for version 4.0:
 ---------------------------------------------------------