removed UnicodePlots dependency

Author: chmerdon

Project.toml

@@ -19,7 +19,6 @@ Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 SparseDiffTools = "47a9eef4-7e08-11e9-0b38-333d64bd3804"
 Symbolics = "0c5d862f-8b57-4792-8d23-62f2024744c7"
-UnicodePlots = "b8865327-cd53-5732-bb35-84acbb429228"
 
 [weakdeps]
 DifferentialEquations = "0c46a032-eb83-5123-abaf-570d42b7fbaa"

src/ExtendableFEM.jl

@@ -13,7 +13,6 @@ using ForwardDiff
 using SparseDiffTools
 using DiffResults
 using Printf
-using UnicodePlots
 using DocStringExtensions
 
 if !isdefined(Base, :get_extension)

src/solvers.jl

@@ -205,7 +205,7 @@ function CommonSolve.solve(PD::ProblemDescription, FES::Union{<:FESpace,Vector{<
 				if SC.parameters[:show_matrix]
 					@show A
 				elseif SC.parameters[:spy]
-					@info ".... spy plot of system matrix:\n$(UnicodePlots.spy(sparse(A.entries.cscmatrix)))"
+					@info ".... spy plot of system matrix:\n$(A.entries.cscmatrix))"
 				end
 				if SC.parameters[:check_matrix]
 					#λ, ϕ = Arpack.eigs(A.entries.cscmatrix; nev = 5, which = :SM, ritzvec = false)