Apply suggestions from code review

Author: gaurav-arya

Project.toml

@@ -5,7 +5,6 @@ version = "1.5.0"
 [deps]
 ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
-Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [weakdeps]

ext/AbstractFFTsTestExt.jl

@@ -6,7 +6,6 @@ using AbstractFFTs
 using AbstractFFTs: TestUtils
 using AbstractFFTs.LinearAlgebra
 using Test
-import Random
 
 # Ground truth x_fft computed using FFTW library
 const TEST_CASES = (
@@ -77,7 +76,7 @@ end
 function TestUtils.test_plan_adjoint(P::AbstractFFTs.Plan, x::AbstractArray;
                                      real_plan=false, copy_input=false, test_wrappers=true)
     _copy = copy_input ? copy : identity
-    y = Random.rand!(P * _copy(x))
+    y = map(a -> rand(typeof(a)), P * _copy(x)) # generically construct rand array
     # test basic properties
     @test_skip eltype(P') === typeof(y) # (AbstractFFTs.jl#110)
     @test (P')' === P # test adjoint of adjoint