empty "console_scripts' is generated although it is not present.

[chfw]

entry_points:
  fs.opener:
    - "pypi = pypifs:PypiFSOpener"

will lead to

+ENTRY_POINTS = {
+    "console_scripts": [
+        " = "
+    ],
+    "fs.opener": [
+        "pypi = pypifs:PypiFSOpener",
+    ],
+}