We have no zttp packaged (yet).

--- uvicorn-0.53.0/pyproject.toml.orig
+++ uvicorn-0.53.0/pyproject.toml
@@ -58,7 +58,6 @@
     "httpx2",
     "anyio",
     # Explicit optionals,
-    "zttp>=0.0.30",
 ]
 docs = [
     "zensical>=0.0.57",