Remove default from environment variable

Click already does that for us.

toot/cli/post.py

@@ -1,14 +1,14 @@
-import sys
-from time import sleep, time
 import click
 import os
+import sys
 
 from datetime import datetime, timedelta, timezone
+from time import sleep, time
 from typing import BinaryIO, Optional, Tuple
 
 from toot import api
 from toot.cli.base import cli, json_option, pass_context, Context
-from toot.cli.base import DURATION_EXAMPLES, VISIBILITY_CHOICES, get_default_visibility
+from toot.cli.base import DURATION_EXAMPLES, VISIBILITY_CHOICES
 from toot.cli.validators import validate_duration, validate_language
 from toot.entities import MediaAttachment, from_dict
 from toot.utils import EOF_KEY, delete_tmp_status_file, editor_input, multiline_input
@@ -40,7 +40,7 @@ from toot.utils.datetime import parse_datetime
     "--visibility", "-v",
     help="Post visibility",
     type=click.Choice(VISIBILITY_CHOICES),
-    default=get_default_visibility(),
+    default="public",
 )
 @click.option(
     "--sensitive", "-s",

toot/cli/statuses.py

@@ -2,7 +2,7 @@ import click
 
 from toot import api
 from toot.cli.base import cli, json_option, Context, pass_context
-from toot.cli.base import VISIBILITY_CHOICES, get_default_visibility
+from toot.cli.base import VISIBILITY_CHOICES
 from toot.output import print_table
 
 
@@ -51,7 +51,7 @@ def unfavourite(ctx: Context, status_id: str, json: bool):
     "--visibility", "-v",
     help="Post visibility",
     type=click.Choice(VISIBILITY_CHOICES),
-    default=get_default_visibility(),
+    default="public",
 )
 @json_option
 @pass_context