With the removal of unexec and purespace, the definitions in these files
are no longer used.  Remove them.

* src/firstfile.c:
* src/lastfile.c: Delete unused files.
* configure.ac (PRE_ALLOC_OBJ, POST_ALLOC_OBJ, FIRSTFILE_OBJ):
Remove variables and dependent code.
* msdos/autogen/Makefile.in:
* msdos/sed1v2.inp:
* src/Makefile.in: Don't use above deleted variables.
* src/deps.mk: Remove lastfile.c dependencies.

* src/gmalloc.c (gdefault_morecore): Remove HYBRID_MALLOC code.
(allocated_via_gmalloc, hybrid_malloc, hybrid_calloc, hybrid_free_1)
(hybrid_free, hybrid_aligned_alloc, hybrid_realloc): Remove functions.

* msdos/sed1v2.inp:
* msdos/sedlibmk.inp:
* src/alloc.c (GC_MALLOC_CHECK, USE_ALIGNED_ALLOC)
(refill_memory_reserve, aligned_alloc):
* src/emacs.c (main):
* src/lastfile.c (my_edata):
* src/lisp.h:
* src/ralloc.c:
* src/sysdep.c (get_current_dir_name_or_unreachable):
* src/xdisp.c (decode_mode_spec): Remove HYBRID_MALLOC conditions.

* configure.ac (hybrid_malloc, HYBRID_MALLOC): Remove variables and
dependent code.
* src/conf_post.h (hybrid_malloc, hybrid_calloc, hybrid_free)
(hybrid_aligned_alloc, hybrid_realloc): Remove conditional prototypes.
* src/Makefile.in (HYBRID_MALLOC): Remove variable.
(base_obj): Remove sheap.o
(LIBEGNU_ARCHIVE):
* lib/Makefile.in (libgnu_a_OBJECTS): Remove libegnu.a support.

* configure.ac: Remove unexec-specific parts.
(EMACS_CONFIG_FEATURES): Always report that we do not have the UNEXEC
feature.
(AC_ECHO): No longer display a line about the unexec feature.
* lisp/loadup.el:
* lisp/startup.el: Remove unexec-specific code.
* src/Makefile.in (base_obj): Drop 'UNEXEC_OBJ'.
* src/alloc.c (staticvec): Never initialize this variable.
(BLOCK_ALIGN): Always allow large blocks.
(mmap_lisp_allowed_p): Remove unexec-specific code.
* src/buffer.c (init_buffer):
* src/conf_post.h (ADDRESS_SANITIZER):
* src/emacs.c (load_pdump, main): Remove unexec-specific code.
(Fdump_emacs): Remove function.
(syms_of_emacs): Remove 'Fdump_emacs'.
* src/lastfile.c: Remove unexec-specific code.
* src/lisp.h (gflags): Remove unexec-specific flags.
(will_dump_p, will_bootstrap_p, will_dump_with_unexec_p)
(dumped_with_unexec_p, definitely_will_not_unexec_p): Remove or adjust
predicates.
(SUBR_SECTION_ATTRIBUTE): Remove unexec-specific definition.
* src/pdumper.c (Fdump_emacs_portable): Remove unexec-specific warning.
* src/process.c (init_process_emacs): Remove !unexec condition
* src/sysdep.c (maybe_disable_address_randomization): Adjust comment.
(init_signals):
* src/timefns.c (init_timefns): Remove unexec-specific code.
* src/w32heap.c (report_temacs_memory_usage): Remove function.
* src/w32heap.h: Adjust comment.
* src/w32image.c (globals_of_w32image): Remove unexec-specific code.

Run "TZ=UTC0 admin/update-copyright".

Run "TZ=UTC0 admin/update-copyright $(git ls-files)".

* configure.ac (CANNOT_DUMP): Remove.  All uses removed,
or changed to the negative of with_unexec.
(HAVE_UNEXEC): New macro.  All uses of CANNOT_DUMP changed
to the negative of this macro.

2fcf2df Fix copyright years by hand
26bed8b Update copyright year to 2019
2814292 Fix value of default frame height.  (Bug#33921)