Remove redundant definition of fmadd functions in complex Vec256 (#37167)
Summary:
These straightforward implementations have already been covered in
vec256_base.h. No need to specialize the template function for complex
types.
https://github.com/pytorch/pytorch/blob/7aec364bdf9ed7297b77e8445a6a6d4116265dde/aten/src/ATen/cpu/vec256/vec256_base.h#L696-L698
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37167
Differential Revision: D21222595
Pulled By: ezyang
fbshipit-source-id: fbe311cd39cafbb6ccec151f9d8e52450b17437f
