Revert "asyncio_run helper to deal with a 3.10 warning, refs #1482"

This reverts commit 98dcabccbb.

datasette/cli.py

@@ -14,7 +14,6 @@ from runpy import run_module
 import webbrowser
 from .app import Datasette, DEFAULT_SETTINGS, SETTINGS, SQLITE_LIMIT_ATTACHED, pm
 from .utils import (
-    asyncio_run,
     StartupError,
     check_connection,
     find_spatialite,
@@ -137,7 +136,9 @@ def cli():
 @click.option("--inspect-file", default="-")
 @sqlite_extensions
 def inspect(files, inspect_file, sqlite_extensions):
-    inspect_data = asyncio_run(inspect_(files, sqlite_extensions))
+    app = Datasette([], immutables=files, sqlite_extensions=sqlite_extensions)
+    loop = asyncio.get_event_loop()
+    inspect_data = loop.run_until_complete(inspect_(files, sqlite_extensions))
     if inspect_file == "-":
         sys.stdout.write(json.dumps(inspect_data, indent=2))
     else:
@@ -554,10 +555,10 @@ def serve(
         return ds
 
     # Run the "startup" plugin hooks
-    asyncio_run(ds.invoke_startup())
+    asyncio.get_event_loop().run_until_complete(ds.invoke_startup())
 
     # Run async soundness checks - but only if we're not under pytest
-    asyncio_run(check_databases(ds))
+    asyncio.get_event_loop().run_until_complete(check_databases(ds))
 
     if get:
         client = TestClient(ds)
@@ -577,7 +578,9 @@ def serve(
     if open_browser:
         if url is None:
             # Figure out most convenient URL - to table, database or homepage
-            path = asyncio_run(initial_path_for_datasette(ds))
+            path = asyncio.get_event_loop().run_until_complete(
+                initial_path_for_datasette(ds)
+            )
             url = f"http://{host}:{port}{path}"
         webbrowser.open(url)
     uvicorn_kwargs = dict(

datasette/utils/__init__.py

@@ -1089,12 +1089,3 @@ async def derive_named_parameters(db, sql):
         return [row["p4"].lstrip(":") for row in results if row["opcode"] == "Variable"]
     except sqlite3.DatabaseError:
         return possible_params
-
-
-def asyncio_run(coro):
-    if hasattr(asyncio, "run"):
-        # Added in Python 3.7
-        return asyncio.run(coro)
-    else:
-        loop = asyncio.get_event_loop()
-        return loop.run_until_complete(coro)