Remove unused curio check (#3010)

diff --git a/httpx/_utils.py b/httpx/_utils.py
index 21241967e36c56d220cb9d589eb22bb44d935f09..bc3cb001dd77589495a48c589833896f175a762f 100644 (file)
--- a/httpx/_utils.py
+++ b/httpx/_utils.py
@@ -295,14 +295,10 @@ class Timer:
             import trio
 
             return trio.current_time()
-        elif library == "curio":  # pragma: no cover
-            import curio
-
-            return typing.cast(float, await curio.clock())
-
-        import asyncio
+        else:
+            import asyncio
 
-        return asyncio.get_event_loop().time()
+            return asyncio.get_event_loop().time()
 
     def sync_start(self) -> None:
         self.started = time.perf_counter()