switch tests again to make nightly happy

Author: MasonProtter

test/runtests.jl

@@ -1,13 +1,10 @@
 using Test, StableTasks
 using StableTasks: @spawn, @spawnat, @fetch, @fetchfrom
 
-if isdefinded(Threads, :maxthreadid)
-    maxthreadid() = Threads.maxthreadid()
-else
-    maxthreadid() = Threads.nthreads()
-end
-
 @testset "Type stability" begin
+    t = @eval Threads.@spawn inv([1 2 ; 3 4])
+    fetch(t)
+    
     @test 2 == @inferred fetch(@spawn 1 + 1)
     t = @eval @spawn inv([1 2 ; 3 4])
     @test inv([1 2 ; 3 4]) == @inferred fetch(t)
@@ -22,8 +19,8 @@ end
     @test inv([1 2 ; 3 4]) == @inferred fetch(t)
 
     @test 2 == @inferred fetch(@spawnat 1 1 + 1)
-    t = @eval @spawnat maxthreadid() inv([1 2 ; 3 4])
-    @test inv([1 2 ; 3 4]) == @inferred fetch(t)
+    t = @eval @spawnat 1 1 + 1
+    @test 2 == @inferred fetch(t)
 end
 
 @testset "API funcs" begin