Disable automatic downloading of components!

Upstream-Status: Inappropriate [disable feature]

Signed-off-by: Mark Hatle <mark.hatle@xilinx.com>

--- a/setup.py
+++ b/setup.py
@@ -317,7 +317,6 @@ setup(  # Finally, pass this all along t
         "certifi>=2020.06.20",
         "numpy>=1.17",
         "setuptools_scm>=4",
-        "setuptools_scm_git_archive",
     ],
     install_requires=[
         "cycler>=0.10",
--- a/setupext.py
+++ b/setupext.py
@@ -64,40 +64,7 @@ def get_from_cache_or_download(url, sha)
     BytesIO
         The file loaded into memory.
     """
-    cache_dir = _get_xdg_cache_dir()
-
-    if cache_dir is not None:  # Try to read from cache.
-        try:
-            data = (cache_dir / sha).read_bytes()
-        except IOError:
-            pass
-        else:
-            if _get_hash(data) == sha:
-                return BytesIO(data)
-
-    # jQueryUI's website blocks direct downloads from urllib.request's
-    # default User-Agent, but not (for example) wget; so I don't feel too
-    # bad passing in an empty User-Agent.
-    with urllib.request.urlopen(
-            urllib.request.Request(url, headers={"User-Agent": ""}),
-            context=_get_ssl_context()) as req:
-        data = req.read()
-
-    file_sha = _get_hash(data)
-    if file_sha != sha:
-        raise Exception(
-            f"The downloaded file does not match the expected sha.  {url} was "
-            f"expected to have {sha} but it had {file_sha}")
-
-    if cache_dir is not None:  # Try to cache the downloaded file.
-        try:
-            cache_dir.mkdir(parents=True, exist_ok=True)
-            with open(cache_dir / sha, "xb") as fout:
-                fout.write(data)
-        except IOError:
-            pass
-
-    return BytesIO(data)
+    raise IOError(f"Automatic downloading is disabled.")
 
 
 def get_and_extract_tarball(urls, sha, dirname):