keywording x64-macos

Package-Manager: portage-2.2.10
Removing ntl from the overlay. Thanks to Jauhien for importing it.
keywording x64-macos

Package-Manager: portage-2.2.10
keywording x64-macos

Package-Manager: portage-2.2.10
Clean up. Only keeping the most potentially useful version not in the main tree.

Package-Manager: portage-2.2.10
Removing our own sympy. Main tree is good.