base: remove unneeded ';' from lnls-get-n-unpack.

Command separator is not needed if there are no commands afterwards.
Drop it as suggested during review [1].

[1] cnpem#80 (comment)

Suggested-by: Gustavo de Souza dos Reis <[email protected]>

Author: marcofilho

base/lnls-get-n-unpack.sh

@@ -8,7 +8,7 @@ case "$1" in
     -r) dest=/ ;;
     -l) dest=. ;;
     *) >&2 echo "Invalid extraction mode: must be either root (-r) or local (-l)."
-       exit 1;
+       exit 1
     ;;
 esac