remove never used err variable assignment disliked by scan-build

scan-build from clang version 9 complains about following:

 nl.c:648:3: warning: Value stored to 'err' is never read
                err = 0;
                ^     ~

Signed-off-by: Petr Štetiar <ynezz@true.cz>

1 files changed, 0 insertions, 1 deletions

diff --git a/nl.c b/nl.c
index 505965f..c875573 100644
--- a/nl.c
+++ b/nl.c
@@ -645,7 +645,6 @@ continue_reading:
 				NL_CB_CALL(cb, NL_CB_VALID, msg);
 		}
 skip:
-		err = 0;
 		hdr = nlmsg_next(hdr, &n);
 	}