break: drop Python 3.8 (#2686)

cibuildwheel/platforms/windows.py

@@ -242,11 +242,6 @@ def setup_rust_cross_compile(
         )
 
 
-def can_use_uv(python_configuration: PythonConfiguration) -> bool:
-    conditions = (not python_configuration.identifier.startswith("pp38-"),)
-    return all(conditions)
-
-
 def setup_python(
     tmp: Path,
     python_configuration: PythonConfiguration,
@@ -278,9 +273,6 @@ def setup_python(
         raise ValueError(msg)
     assert base_python.exists()
 
-    if build_frontend == "build[uv]" and not can_use_uv(python_configuration):
-        build_frontend = "build"
-
     use_uv = build_frontend in {"build[uv]", "uv"}
     uv_path = find_uv()
 
@@ -419,7 +411,7 @@ def build(options: Options, tmp_path: Path) -> None:
         for config in python_configurations:
             build_options = options.build_options(config.identifier)
             build_frontend = build_options.build_frontend
-            use_uv = build_frontend.name in {"build[uv]", "uv"} and can_use_uv(config)
+            use_uv = build_frontend.name in {"build[uv]", "uv"}
             log.build_start(config.identifier)
 
             identifier_tmp_dir = tmp_path / config.identifier
@@ -471,7 +463,6 @@ def build(options: Options, tmp_path: Path) -> None:
                         project=".",
                         package=options.globals.package_dir,
                     ),
-                    py38=config.identifier[1:].startswith("p38"),
                 )
 
                 if (