Removed "pooling_mode_weightedmean_tokens" and "pooling_mode_lasttoken" which are not yet supported in sentence-transformers 2.2.2

1_Pooling/config.json

@@ -4,6 +4,4 @@
   "pooling_mode_mean_tokens": true,
   "pooling_mode_max_tokens": false,
   "pooling_mode_mean_sqrt_len_tokens": false,
-  "pooling_mode_weightedmean_tokens": false,
-  "pooling_mode_lasttoken": false
 }