Clean up imports (#895)

* Clean up imports

* Version bump to v0.13.21

Author: jishnub

Project.toml

@@ -1,18 +1,16 @@
 name = "ApproxFun"
 uuid = "28f2ccd6-bb30-5033-b560-165f7b14dc2f"
-version = "0.13.20"
+version = "0.13.21"
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"
 ApproxFunBase = "fbd15aa5-315a-5a7d-a8a4-24992e37be05"
 ApproxFunFourier = "59844689-9c9d-51bf-9583-5b794ec66d30"
 ApproxFunOrthogonalPolynomials = "b70543e2-c0d9-56b8-a290-0d4d6d4de211"
 ApproxFunSingularities = "f8fcb915-6b99-5be2-b79a-d6dbef8e6e7e"
-BandedMatrices = "aae01518-5342-5314-be14-df237901396f"
 Calculus = "49dc2e85-a5d0-5ad3-a950-438e2897f1b9"
 DomainSets = "5b8099bc-c8ec-5219-889f-1d9e522a28bf"
 DualNumbers = "fa6b7ba4-c1ee-5f82-b5fc-ecf0adba8f74"
-FFTW = "7a1cc6ca-52ef-59f5-83cd-3a7055c09341"
 FastTransforms = "057dd010-8810-581a-b7be-e3fc3b93f78c"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 RecipesBase = "3cdcf5f2-1ef4-517c-9805-6587b60abb01"
@@ -51,11 +49,13 @@ julia = "1.6"
 [extras]
 ApproxFunBaseTest = "a931bfaf-0cfd-4a5c-b69c-bf2eed002b43"
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
+BandedMatrices = "aae01518-5342-5314-be14-df237901396f"
 BlockBandedMatrices = "ffab5731-97b5-5995-9138-79e8c1846df0"
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 DualNumbers = "fa6b7ba4-c1ee-5f82-b5fc-ecf0adba8f74"
+FFTW = "7a1cc6ca-52ef-59f5-83cd-3a7055c09341"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["ApproxFunBaseTest", "Aqua", "BlockBandedMatrices", "Documenter", "DualNumbers", "Random", "Test"]
+test = ["ApproxFunBaseTest", "Aqua", "BandedMatrices", "BlockBandedMatrices", "Documenter", "DualNumbers", "FFTW", "Random", "Test"]

src/ApproxFun.jl

@@ -1,7 +1,12 @@
 module ApproxFun
-using Base, Reexport,
-		AbstractFFTs, FFTW, FastTransforms,
-		LinearAlgebra, RecipesBase, DomainSets, SpecialFunctions #, Arpack
+
+using AbstractFFTs
+using DomainSets
+using FastTransforms
+using LinearAlgebra
+using RecipesBase
+using Reexport
+using SpecialFunctions
 
 import Calculus
 
@@ -29,10 +34,7 @@ import ApproxFunOrthogonalPolynomials: order
 
 using ApproxFunSingularities: LeftIntegral, LeftDerivative, RightDerivative, RightIntegral
 
-import BandedMatrices: bandwidths
-
-import AbstractFFTs: Plan, fft, ifft
-import FFTW: plan_fft, plan_ifft, plan_ifft!
+import AbstractFFTs: Plan, fft, ifft, plan_fft, plan_ifft, plan_ifft!
 
 import Base: convert, getindex, *, +, -, /, ^, \, sum, cumsum,
                 first, last, isempty, zeros, promote_rule,
@@ -44,19 +46,12 @@ import Base: convert, getindex, *, +, -, /, ^, \, sum, cumsum,
                 asind, acosd, atand, asecd, acscd, acotd, sinh, cosh, tanh, sech, csch,
                 coth, asinh, acosh, atanh, asech, acsch, acoth, deg2rad, rad2deg
 
-import LinearAlgebra: eigvals, dot, adjoint
+import LinearAlgebra: adjoint
 
 import SpecialFunctions: erf, erfinv, erfc, erfcinv, erfi, gamma, lgamma, digamma, invdigamma,
                 trigamma, airyai, airybi, airyaiprime, airybiprime, besselj0, besselj1,
                 bessely0, bessely1, erfcx, dawson
 
-# import Arpack: eigs
-
-
-import FastTransforms: ChebyshevTransformPlan, plan_chebyshevtransform,
-                        plan_chebyshevtransform!, plan_ichebyshevtransform,
-                        plan_ichebyshevtransform!
-
 using StaticArrays: SVector
 
 """

src/Extras/Extras.jl

@@ -11,8 +11,6 @@ include("fftGeneric.jl")
 digits(n::Int) = set_bigfloat_precision(round(Int,ceil(n*log2(10))))
 digits() = round(Int,floor(get_bigfloat_precision()*log10(2)))
 
-import FastTransforms: pochhammer
-
 include("poetry.jl")
 
 include("simplify.jl")
@@ -24,6 +22,7 @@ function dualFun end
 function dualcfsFun end
 
 if !isdefined(Base, :get_extension)
-	include(joinpath(dirname(dirname(pathof(@__MODULE__))), "ext", "ApproxFunDualNumbersExt.jl"))
+	parentdir = dirname(dirname(pathof(@__MODULE__)))
+	include(joinpath(parentdir, "ext", "ApproxFunDualNumbersExt.jl"))
 end
 include("lanczos.jl")