Update lib/OptimizationManopt/src/OptimizationManopt.jl

Author: ChrisRackauckas

lib/OptimizationManopt/src/OptimizationManopt.jl

@@ -334,7 +334,6 @@ function SciMLBase.__solve(cache::OptimizationCache{
             u = θ,
             p = cache.p,
             objective = x[1])
-        #TODO: What is this callback for?
         cb_call = cache.callback(opt_state, x...)
         if !(cb_call isa Bool)
             error("The callback should return a boolean `halt` for whether to stop the optimization process.")