Drop -fno-delete-null-pointer-checks

Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>

packaging/nodejs.spec.j2

@@ -541,8 +541,6 @@ export CXX='%{__cxx}'
 export NODE_GYP_FORCE_PYTHON=%{python3}
 
 # build with debugging symbols and add defines from libuv (#892601)
-# Node's v8 breaks with GCC 6 because of incorrect usage of methods on
-# NULL objects. We need to pass -fno-delete-null-pointer-checks
 # 2022-07-14: There's a bug in either torque or gcc that causes a
 # segmentation fault on ppc64le and s390x if compiled with -O2. Things
 # run fine on -O1 and -O3, so we'll just go with -O3 (like upstream)
@@ -551,7 +549,6 @@ extra_cflags=(
     -D_LARGEFILE_SOURCE
     -D_FILE_OFFSET_BITS=64
     -DZLIB_CONST
-    -fno-delete-null-pointer-checks
     -O3
     -fno-ipa-icf
 )