Remove unnecessary assert

We are only interested in asterisks and column names. Everything
else - integers, floating point numbers, strings, etc. - is of
no interest and not an error.

query_classifier/qc_sqlite/qc_sqlite.cc

@@ -1117,10 +1117,6 @@ public:
                 }
             }
         }
-        else
-        {
-            ss_dassert(!true);
-        }
 
         if (zColumn)
         {