export v1: Remove --metadata-id-columns

This was added to both export v1 and v2 as part of a larger change¹, but
that change was incomplete and did not work as intended. It has been
fixed for export v2².

Since export v1 is no longer being maintained, remove the option instead
of trying to fix it here as well.

¹ 42f6cb2
² 9bf1b4c

augur/export_v1.py

@@ -11,7 +11,7 @@
 from collections import defaultdict
 from .errors import AugurError
 from .argparse_ import ExtendAction
-from .io.metadata import DEFAULT_DELIMITERS, DEFAULT_ID_COLUMNS, InvalidDelimiter, read_metadata
+from .io.metadata import DEFAULT_DELIMITERS, InvalidDelimiter, read_metadata
 from .utils import read_node_data, write_json, read_config, read_lat_longs, read_colors
 
 def convert_tree_to_json_structure(node, metadata, div=0, strains=None):
@@ -315,8 +315,6 @@ def add_core_args(parser):
     core.add_argument('--metadata', required=True, metavar="FILE", help="sequence metadata")
     core.add_argument('--metadata-delimiters', default=DEFAULT_DELIMITERS, nargs="+",
                       help="delimiters to accept when reading a metadata file. Only one delimiter will be inferred.")
-    core.add_argument('--metadata-id-columns', default=DEFAULT_ID_COLUMNS, nargs="+",
-                                 help="names of possible metadata columns containing identifier information, ordered by priority. Only one ID column will be inferred.")
     core.add_argument('--node-data', required=True, nargs='+', action=ExtendAction, help="JSON files with meta data for each node")
     core.add_argument('--output-tree', help="JSON file name that is passed on to auspice (e.g., zika_tree.json).")
     core.add_argument('--output-meta', help="JSON file name that is passed on to auspice (e.g., zika_meta.json).")
@@ -376,8 +374,7 @@ def run(args):
     try:
         meta_tsv = read_metadata(
             args.metadata,
-            delimiters=args.metadata_delimiters,
-            id_columns=args.metadata_id_columns)
+            delimiters=args.metadata_delimiters)
     except InvalidDelimiter:
         raise AugurError(
             f"Could not determine the delimiter of {args.metadata!r}. "