Remove unnecessary code from the window functions implementation.

FossilOrigin-Name: 1e87da9c93309d1d69b1e0ab65c615b9ff9c1c6813ad0c7b90d2495be4ba0adc

src/window.c

@@ -1082,7 +1082,6 @@ int sqlite3WindowRewrite(Parse *pParse, Select *p){
       assert( pParse->db->mallocFailed );
       sqlite3ErrorToParser(pParse->db, SQLITE_NOMEM);
     }
-    sqlite3SelectReset(pParse, p);
   }
   return rc;
 }