remove unused params

src/fhn_solver.jl

@@ -16,7 +16,7 @@ using .Laplacian
     # Arguments:
     `U`: activator matrix
     `V`: inhibitor matrix
-    `param_obs`: used parameters from FHNParams
+    `param_obs`: used parameters from CombinedPDEParams
     `dx`: dx
     `dt`: dt
 """

src/gray_scott_solver.jl

@@ -14,7 +14,7 @@ using .Laplacian
     # Arguments:
     `U`: activator matrix
     `V`: inhibitor matrix
-    `param_obs`: used parameters from FHNParams
+    `param_obs`: used parameters from CombinedPDEParams
     `dx`: dx
 """
 function step_gray_scott!(U, V, params_obs::Observable; dx=1)

src/utils/constants.jl

@@ -2,25 +2,6 @@
 
 abstract type PDEParams end
 
-struct FHNParams <: PDEParams
-    N::Int
-    dx::Float64 # grid spacing
-    Du::Float64
-    Dv::Float64
-    ϵ::Float64
-    a::Float64
-    b::Float64
-end
-
-struct GSParams <: PDEParams
-    N::Int       # grid size
-    dx::Float64  # grid spacing
-    Du::Float64  # diffusion rate U
-    Dv::Float64  # diffusion rate V
-    F::Float64   # feed rate
-    k::Float64   # kill rate
-
-end
 
 struct CombinedPDEParams <: PDEParams
     N::Int