fix admin2 import docs

Author: geohacker

README.md

@@ -229,9 +229,7 @@ The above command will generate a list of missing admin2s in the database based
 
 ### Options available for the command
 * `--update-geom` -- updates the geometry for all admin2 matched in the shapefile.
-* `--update-bbox` -- updates the bbox for all admin2 matched in the shapefile.
-* `--update-centroid` -- updates the centroid for all admin2 matched in the shapefile.
-* `--import-missing missing-admin2.txt` -- this will import admin2 listed in `missing-districts.txt` to the database. The file is the same format as generated by the default command.
+* `--import-missing missing-admin2.txt` -- this will import admin2 listed in `missing-admin2.txt` to the database. The file is the same format as generated by the default command.
 * `--import-all` -- this option is used to import all admin2 in the shapefile.