mingw: drop the build-system plumbing for nedmalloc

With the previous commit removing every opt-in, the build-system
plumbing for nedmalloc has nothing left to switch on. Remove it so
that the upcoming deletion of the compat/nedmalloc/ tree is a pure
file removal.

Assisted-by: Opus 4.7
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Makefile

@@ -283,13 +283,9 @@ include shared.mak
 # Define SKIP_DASHED_BUILT_INS if you do not need the dashed versions of the
 # built-ins to be linked/copied at all.
 #
-# Define USE_NED_ALLOCATOR if you want to replace the platforms default
-# memory allocators with the nedmalloc allocator written by Niall Douglas.
-#
 # Define OVERRIDE_STRDUP to override the libc version of strdup(3).
 # This is necessary when using a custom allocator in order to avoid
 # crashes due to allocation and free working on different 'heaps'.
-# It's defined automatically if USE_NED_ALLOCATOR is set.
 #
 # Define NO_REGEX if your C library lacks regex support with REG_STARTEND
 # feature.
@@ -1511,7 +1507,6 @@ BUILTIN_OBJS += builtin/write-tree.o
 # upstream unnecessarily (making merging in future changes easier).
 THIRD_PARTY_SOURCES += compat/inet_ntop.c
 THIRD_PARTY_SOURCES += compat/inet_pton.c
-THIRD_PARTY_SOURCES += compat/nedmalloc/%
 THIRD_PARTY_SOURCES += compat/obstack.%
 THIRD_PARTY_SOURCES += compat/poll/%
 THIRD_PARTY_SOURCES += compat/regex/%
@@ -2267,12 +2262,6 @@ ifdef NATIVE_CRLF
 	BASIC_CFLAGS += -DNATIVE_CRLF
 endif
 
-ifdef USE_NED_ALLOCATOR
-	COMPAT_CFLAGS += -Icompat/nedmalloc
-	COMPAT_OBJS += compat/nedmalloc/nedmalloc.o
-	OVERRIDE_STRDUP = YesPlease
-endif
-
 ifdef OVERRIDE_STRDUP
 	COMPAT_CFLAGS += -DOVERRIDE_STRDUP
 	COMPAT_OBJS += compat/strdup.o
@@ -2983,12 +2972,6 @@ compat/regex/regex.sp compat/regex/regex.o: EXTRA_CPPFLAGS = \
 	-DGAWK -DNO_MBSUPPORT
 endif
 
-ifdef USE_NED_ALLOCATOR
-compat/nedmalloc/nedmalloc.sp compat/nedmalloc/nedmalloc.o: EXTRA_CPPFLAGS = \
-	-DNDEBUG -DREPLACE_SYSTEM_ALLOCATOR
-compat/nedmalloc/nedmalloc.sp: SP_EXTRA_FLAGS += -Wno-non-pointer-null
-endif
-
 headless-git.o: compat/win32/headless.c GIT-CFLAGS
 	$(QUIET_CC)$(CC) $(ALL_CFLAGS) $(COMPAT_CFLAGS) \
 		-fno-stack-protector -o $@ -c -Wall -Wwrite-strings $<

config.mak.uname

@@ -491,7 +491,6 @@ ifeq ($(uname_S),Windows)
 	USE_WIN32_IPC = YesPlease
 	USE_WIN32_MMAP = YesPlease
 	MMAP_PREVENTS_DELETE = UnfortunatelyYes
-	# USE_NED_ALLOCATOR = YesPlease
 	UNRELIABLE_FSTAT = UnfortunatelyYes
 	OBJECT_CREATION_USES_RENAMES = UnfortunatelyNeedsTo
 	NO_REGEX = YesPlease

contrib/vscode/init.sh

@@ -202,7 +202,6 @@ cat >.vscode/settings.json.new <<\EOF ||
         "\\bUSE_STDEV\\b",
         "\\Wchar *\\*\\W*utfs\\W",
         "cURL's",
-        "nedmalloc'ed",
         "ntifs\\.h",
     ],
 }

meson.build

@@ -698,7 +698,6 @@ third_party_excludes = [
   ':!contrib',
   ':!compat/inet_ntop.c',
   ':!compat/inet_pton.c',
-  ':!compat/nedmalloc',
   ':!compat/obstack.*',
   ':!compat/poll',
   ':!compat/regex',