Fafurion dragon weapon fix

[GuruGel]

the weapon must be non-grade, so I cut out the R grade value.
https://pastebin.com/Xhbj4T3e

[Mobius]

Committed with https://bitbucket.org/MobiusDev/l2j_mobius/commits/37d71f9e6f58497d9cb09c5d2b2eb3bb34ae9427
Thanks