Remove optimizationflux docs

Author: Vaibhavdixit02

docs/pages.jl

@@ -24,7 +24,6 @@ pages = ["index.md",
         "BlackBoxOptim.jl" => "optimization_packages/blackboxoptim.md",
         "CMAEvolutionStrategy.jl" => "optimization_packages/cmaevolutionstrategy.md",
         "Evolutionary.jl" => "optimization_packages/evolutionary.md",
-        "Flux.jl" => "optimization_packages/flux.md",
         "GCMAES.jl" => "optimization_packages/gcmaes.md",
         "Manopt.jl" => "optimization_packages/manopt.md",
         "MathOptInterface.jl" => "optimization_packages/mathoptinterface.md",