Delete broken fitting code

Author: mtfishman

src/ITensorNetworks.jl

@@ -65,7 +65,6 @@ include("solvers/operator_map.jl")
 include("solvers/abstract_problem.jl")
 include("solvers/eigsolve.jl")
 include("solvers/applyexp.jl")
-include("solvers/fitting.jl")
 
 include("apply.jl")
 include("inner.jl")