build: remove explicit libssp linking from Windows build

configure.ac

@@ -988,12 +988,6 @@ if test "$use_hardening" != "no"; then
   AX_CHECK_LINK_FLAG([-Wl,-z,now], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"], [], [$LDFLAG_WERROR])
   AX_CHECK_LINK_FLAG([-Wl,-z,separate-code], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,separate-code"], [], [$LDFLAG_WERROR])
   AX_CHECK_LINK_FLAG([-fPIE -pie], [PIE_FLAGS="-fPIE"; HARDENED_LDFLAGS="$HARDENED_LDFLAGS -pie"], [], [$CXXFLAG_WERROR])
-
-  case $host in
-    *mingw*)
-       AC_CHECK_LIB([ssp], [main], [], [AC_MSG_ERROR([libssp missing])])
-    ;;
-  esac
 fi
 
 dnl These flags are specific to ld64, and may cause issues with other linkers.