tests: Rename uasyncio to asyncio.

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

tests/net_hosted/asyncio_start_server.py

@@ -1,13 +1,10 @@
-# Test basic behaviour of uasyncio.start_server()
+# Test basic behaviour of asyncio.start_server()
 
 try:
-    import uasyncio as asyncio
+    import asyncio
 except ImportError:
-    try:
-        import asyncio
-    except ImportError:
-        print("SKIP")
-        raise SystemExit
+    print("SKIP")
+    raise SystemExit
 
 
 async def test():