python3: Remove --without-pymalloc

--without-pymalloc was added in 7bf1ae65a8
because leaving it enabled added an "m" flag/suffix to file names.

This flag/suffix was removed in Python 3.8[1], so disabling pymalloc is
no longer necessary.

[1]: https://docs.python.org/3.8/whatsnew/3.8.html#build-and-c-api-changes

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
(cherry picked from commit 3032e7063f)

lang/python/python3/Makefile

@@ -11,7 +11,7 @@ include $(TOPDIR)/rules.mk
 include ../python3-version.mk
 
 PKG_NAME:=python3
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 PKG_VERSION:=$(PYTHON3_VERSION).$(PYTHON3_VERSION_MICRO)
 
 PKG_SOURCE:=Python-$(PKG_VERSION).tar.xz
@@ -160,7 +160,6 @@ CONFIGURE_ARGS+= \
 	--with-system-ffi \
 	--without-cxx-main \
 	--without-ensurepip \
-	--without-pymalloc \
 	--disable-test-modules \
 	$(if $(CONFIG_IPV6),--enable-ipv6) \
 	$(if $(findstring mips,$(CONFIG_ARCH)),,--with-lto) \
@@ -335,7 +334,6 @@ HOST_CONFIGURE_ARGS+= \
 	--with-system-expat=$(STAGING_DIR_HOST) \
 	--with-ssl-default-suites=openssl \
 	--without-cxx-main \
-	--without-pymalloc \
 	--disable-test-modules \
 	CONFIG_SITE=