When Content-Length is not available, just download it.

Anecdotally, the kind of servers that don't provide Content-Length are also the
kind you don't want to be issuing many small requests to.

honesty/deps.py

@@ -240,7 +240,7 @@ def _fetch_single_deps(
         for fe in package.releases[v].files:
             if fe.file_type == FileType.BDIST_WHEEL:
                 LOG.info(f"wheel {fe.url} {fe.size}")
-                if fe.size is None or fe.size > 20000000:
+                if fe.size is not None and fe.size > 20000000:
                     # Gigantic wheels we'll pay the remote read penalty
                     # the 'or ()' is needed for numpy
                     return read_metadata_remote_wheel(fe.url) or ()