Remove update_coefficients calls in operator evaluation

Author: gaurav-arya

src/differentiation/jaches_products.jl

@@ -218,12 +218,10 @@ function update_coefficients!(L::FwdModeAutoDiffVecProd, u, p, t)
 end
 
 function (L::FwdModeAutoDiffVecProd)(v, p, t)
-    L = update_coefficients(L, v, p, t)
     L.vecprod(L.f, L.u, v)
 end
 
 function (L::FwdModeAutoDiffVecProd)(dv, v, p, t)
-    update_coefficients!(L, v, p, t)
     L.vecprod!(dv, L.f, L.u, v, L.cache...)
 end