depends: remove NO_HARDEN option

This only existed to workaround a (iirc libtool related) windows issue
that only occured when compiling without hardening. We no-longer use
libtool, and I can no-longer create the failure.

depends/gen_id

@@ -3,7 +3,7 @@
 # Usage: env [ CC=... ] [ C_STANDARD=...] [ CXX=... ] [CXX_STANDARD=...] \
 #            [ CPPFLAGS=... ] [CFLAGS=...] [CXXFLAGS=...] [LDFLAGS=...] \
 #            [ AR=... ] [ NM=... ] [ RANLIB=... ] [ STRIP=... ] [ DEBUG=... ] \
-#            [ LTO=... ] [ NO_HARDEN=... ] ./gen_id [ID_SALT]...
+#            [ LTO=... ] ./gen_id [ID_SALT]...
 #
 # Prints to stdout a SHA256 hash representing the current toolset, used by
 # depends/Makefile as a build id for caching purposes (detecting when the
@@ -93,10 +93,6 @@
     echo "LTO=${LTO}"
     echo "END LTO"
 
-    echo "BEGIN NO_HARDEN"
-    echo "NO_HARDEN=${NO_HARDEN}"
-    echo "END NO_HARDEN"
-
     echo "END ALL"
 ) | if [ -n "$DEBUG" ] && command -v tee > /dev/null 2>&1; then
         # When debugging and `tee` is available, output the preimage to stderr