remove pattern from kw insertion

db.py

@@ -171,10 +171,10 @@ class db():
         return ret
 
     def add_keyword(self, kw, weight):
-        kw["pattern"] = self.to_regex(kw.split("|"))
         kwdb = self.client[self.DB]["keywords"]
         try:
-            kwdb.insert_one({'keyword': kw, 'weight': weight})
+            data = {'keyword': kw, 'weight': weight}
+            kwdb.insert_one(data)
             return True
         except errors.DuplicateKeyError:
             print("Dup KW")