diff --git a/src/solvers/solvers_base.jl b/src/solvers/solvers_base.jl
deleted file mode 100644
index 99f1ef4..0000000
--- a/src/solvers/solvers_base.jl
+++ /dev/null
@@ -1,53 +0,0 @@
-# This file is a part of JuliaFEM.
-# License is MIT: see https://github.com/JuliaFEM/FEMBase.jl/blob/master/LICENSE
-
-mutable struct LinearSystem{Tv, Ti<:Integer}
-    M :: SparseMatrixCSC{Tv, Ti}
-    K :: SparseMatrixCSC{Tv, Ti}
-    Kg :: SparseMatrixCSC{Tv, Ti}
-    C1 :: SparseMatrixCSC{Tv, Ti}
-    C2 :: SparseMatrixCSC{Tv, Ti}
-    D :: SparseMatrixCSC{Tv, Ti}
-    f :: SparseVector{Tv, Ti}
-    fg :: SparseVector{Tv, Ti}
-    g :: SparseVector{Tv, Ti}
-    u :: SparseVector{Tv, Ti}
-    la :: SparseVector{Tv, Ti}
-    dim :: Int
-end 
-
-function LinearSystem(dim::Int)
-    return LinearSystem(spzeros(dim, dim), spzeros(dim, dim),
-                        spzeros(dim, dim), spzeros(dim, dim),
-                        spzeros(dim, dim), spzeros(dim, dim),
-                        spzeros(dim), spzeros(dim), spzeros(dim),
-                        spzeros(dim), spzeros(dim), dim)
-end
-
-abstract type AbstractLinearSystemSolver end
-
-function solve!(::LinearSystem, ::Solver) where Solver<:AbstractLinearSystemSolver
-    @info("This is a placeholder function for solving linear systems. To solve " *
-          "linear systems, you must define a function " *
-          "solve!(system::LinearSystem, solver::$Solver)")
-end
-
-function can_solve(::LinearSystem, ::Solver) where Solver<:AbstractLinearSystemSolver
-    return (true, "OK")
-end
-
-function solve!(ls::LinearSystem, solvers::Vector{S}) where S<:AbstractLinearSystemSolver
-    for solver in solvers
-        Solver = typeof(solver)
-        cansolve, msg = can_solve(ls, solver)
-        if !cansolve
-            @info("Solver $Solver cannot solve linear system: $msg")
-            continue
-        end
-        timeit("solve linear system using solver $Solver") do
-            solve!(ls, solver)
-        end
-        return
-    end
-    error("Failed to solve linear system.")
-end