Update defaults.txt which resolves issue 604 (#607)

* Update defaults.txt

removed duplicate line with erroneous colon.

* Update defaults.txt

* Deleted erroneous colon from data set.

An erroneous colon was causing a unpacking error.  Removed the line of data. Resolves issue 604.

routersploit/resources/wordlists/defaults.txt

@@ -7,7 +7,6 @@
 666666:666666
 66666:6666666
 888888:888888
-888888:888888:
 ADMINISTRATOR:ADMINISTRATOR
 ADMN:admn
 ADVMAIL:HP