Merge pull request #644 from SciML/remove-get-extension-compat

Remove Julia v1.9 get_extension compatibility code

Author: ChrisRackauckas

ext/LinearSolveIterativeSolversExt.jl

@@ -4,11 +4,7 @@ using LinearSolve, LinearAlgebra
 using LinearSolve: LinearCache, DEFAULT_PRECS
 import LinearSolve: IterativeSolversJL
 
-if isdefined(Base, :get_extension)
-    using IterativeSolvers
-else
-    using ..IterativeSolvers
-end
+using IterativeSolvers
 
 function LinearSolve.IterativeSolversJL(args...;
         generate_iterator = IterativeSolvers.gmres_iterable!,

test/runtests.jl

@@ -4,7 +4,7 @@ const LONGER_TESTS = false
 
 const GROUP = get(ENV, "GROUP", "All")
 
-const HAS_EXTENSIONS = isdefined(Base, :get_extension)
+const HAS_EXTENSIONS = true
 
 if GROUP == "All" || GROUP == "Core"
     @time @safetestset "Basic Tests" include("basictests.jl")