Revert "package/bitcoin: unset the NDEBUG flag"

Setting NDEBUG is no longer done by the infra.

This reverts commit f098aff4792a0e792bda4d7d1ec22a5af1381d83.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/bitcoin/bitcoin.mk

@@ -13,12 +13,6 @@ BITCOIN_CPE_ID_VENDOR = bitcoin
 BITCOIN_CPE_ID_PRODUCT = bitcoin_core
 BITCOIN_DEPENDENCIES = host-pkgconf boost libevent
 BITCOIN_MAKE_ENV = BITCOIN_GENBUILD_NO_GIT=1
-# Bitcoin is using assert(...) extensively with the assumption of it
-# never being a noop at runtime. So we cannot build with NDEBUG.
-BITCOIN_CONF_ENV = \
-	CPPFLAGS="$(TARGET_CPPFLAGS) -UNDEBUG" \
-	CFLAGS="$(TARGET_CFLAGS) -UNDEBUG" \
-	CXXFLAGS="$(TARGET_CXXFLAGS) -UNDEBUG"
 BITCOIN_CONF_OPTS = \
 	--disable-bench \
 	--disable-wallet \