Remove stale self.permissions dictionary and get_permission() method

The self.permissions dictionary was declared in __init__ but never
populated - only self.actions gets populated during startup.

The get_permission() method was unused legacy code that tried to look
up permissions from the empty self.permissions dictionary.

Changes:
- Removed self.permissions = {} from Datasette.__init__
- Removed get_permission() method (unused)
- Renamed test_get_permission → test_get_action to match actual method being tested

All tests pass, confirming these were unused artifacts.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

datasette/app.py

@@ -322,7 +322,6 @@ class Datasette:
         self.inspect_data = inspect_data
         self.immutables = set(immutables or [])
         self.databases = collections.OrderedDict()
-        self.permissions = {}  # .invoke_startup() will populate this
         self.actions = {}  # .invoke_startup() will populate this
         try:
             self._refresh_schemas_lock = asyncio.Lock()
@@ -546,20 +545,6 @@ class Datasette:
                 pass
         return environment
 
-    def get_permission(self, name_or_abbr: str) -> "Permission":
-        """
-        Returns a Permission object for the given name or abbreviation. Raises KeyError if not found.
-        """
-        if name_or_abbr in self.permissions:
-            return self.permissions[name_or_abbr]
-        # Try abbreviation
-        for permission in self.permissions.values():
-            if permission.abbr == name_or_abbr:
-                return permission
-        raise KeyError(
-            "No permission found with name or abbreviation {}".format(name_or_abbr)
-        )
-
     def get_action(self, name_or_abbr: str):
         """
         Returns an Action object for the given name or abbreviation. Returns None if not found.

tests/test_internals_datasette.py

@@ -161,7 +161,7 @@ def test_datasette_error_if_string_not_list(tmpdir):
 
 
 @pytest.mark.asyncio
-async def test_get_permission(ds_client):
+async def test_get_action(ds_client):
     ds = ds_client.ds
     for name_or_abbr in ("vi", "view-instance", "vt", "view-table"):
         action = ds.get_action(name_or_abbr)