Revert "ios: retry curl with http1.1, attempt to fix curl failure"

This reverts commit 8cfb4ca.
... pr comments flagged, this failure in ci could have been due to flaky
issues

Author: clintonsteiner

Apple/__main__.py

@@ -345,36 +345,16 @@ def download(url: str, target_dir: Path) -> Path:
 
     out_path = target_path / basename(url)
     if not Path(out_path).is_file():
-        curl_attempts = [
-            [],
-            # Retry over HTTP/1.1 if the initial transfer fails with a curl
-            # transport error (commonly seen with some runner/proxy setups).
-            ["--http1.1"],
-        ]
-        for i, extra_args in enumerate(curl_attempts, 1):
-            try:
-                run([
-                    "curl",
-                    "-Lf",
-                    "--retry",
-                    "5",
-                    "--retry-all-errors",
-                    *extra_args,
-                    "-o",
-                    out_path,
-                    url,
-                ])
-            except CalledProcessError as exc:
-                if i < len(curl_attempts) and exc.returncode in {16, 56, 92}:
-                    out_path.unlink(missing_ok=True)
-                    print(
-                        f"curl exited {exc.returncode}; "
-                        "retrying download with --http1.1"
-                    )
-                    continue
-                raise
-            else:
-                break
+        run([
+            "curl",
+            "-Lf",
+            "--retry",
+            "5",
+            "--retry-all-errors",
+            "-o",
+            out_path,
+            url,
+        ])
     else:
         print(f"Using cached version of {basename(url)}")
     return out_path