test: remove test for creating incomplete SDEProblem

Author: AayushSabharwal

test/sdesystem.jl

@@ -36,10 +36,6 @@ solexpr = solve(eval(probexpr), SRIW1(), seed = 1)
 
 @test all(x -> x == 0, Array(sol - solexpr))
 
-# Test no error
-@test_nowarn SDEProblem(de, nothing, (0, 10.0))
-@test SDEProblem(de, nothing).tspan == (0.0, 10.0)
-
 noiseeqs_nd = [0.01*x 0.01*x*y 0.02*x*z
                σ 0.01*y 0.02*x*z
                ρ β 0.01*z]