Remove equals overrides from Remote
Remove equals overrides from Remote

We previously removed the implementation for IEquatable, but
accidentally left the operator overloads. Get rid of them.

While in the area, remove an unused variable.

red-gate/libgit2sharp,PKRoma/libgit2sharp,Zoxive/libgit2sharp,libgit2/libgit2sharp,red-gate/libgit2sharp,Zoxive/libgit2sharp