Removed useless warning.

diff --git a/include/pshpack8.h b/include/pshpack8.h
index 443808d..7ec95a0 100644
--- a/include/pshpack8.h
+++ b/include/pshpack8.h
@@ -43,6 +43,5 @@
 #  endif
 
 #  pragma pack(8)
-#  warning "8 as alignment is not supported"
 
 #endif