Remove use of homebrew's version of curl.

Author: freakboy3742

.github/workflows/release.yaml

@@ -83,7 +83,10 @@ jobs:
 
         # 2020-06-24: The Homebrew copy of gettext leaks into the macOS build
         # if it is present. Uninstall gettext to make sure that doesn't happen.
-        brew uninstall --ignore-dependencies gettext
+        # 2021-01-02: Uninstall curl as well. We need curl to download the
+        # source bundles, but Homebrew's curl has a runtime dependency on
+        # gettext. However macOS provides a version of curl that works fine.
+        brew uninstall --ignore-dependencies gettext curl
 
         # Do the build for the requested target.
         make -e ${{ matrix.target }}