ci: remove jobs for manylinux1 x64 builds
ci: remove jobs for manylinux1 x64 builds

The manylinux2010 x64 jobs were producing manylinux1 wheels it appears.
So these jobs were redundant.

indygreg/python-zstandard,indygreg/python-zstandard,indygreg/python-zstandard,indygreg/python-zstandard