Remove unnecessary tests

Author: HarrisonGrodin

test/ambiguity.jl

@@ -4,11 +4,14 @@ using Test
 # Derivatives
 @Param t σ ρ β
 @Unknown x(t) y(t) z(t)
-@Deriv D'~t
-dsin = D(sin(t))
-expand_derivatives(dsin)
+@Deriv D'~t D2''~t
+
+@test expand_derivatives(D(t)) == 1
+@test expand_derivatives(D(D(t))) == 0
 
+dsin = D(sin(t))
 @test expand_derivatives(dsin) == cos(t)
+
 dcsch = D(csch(t))
 @test expand_derivatives(dcsch) == simplify_constants(coth(t) * csch(t) * -1)
 

test/basic_variables_and_operations.jl

@@ -1,8 +1,6 @@
 using ModelingToolkit, Test
 
 @testset "Parsing Test" begin include("variable_parsing.jl") end
-@testset "Basic Variables and Operations" begin include("basic_variables_and_operations.jl") end
 @testset "Differentiation Test" begin include("derivatives.jl") end
 @testset "Simplify Test" begin include("simplify.jl") end
-@testset "Ambiguity Test" begin include("ambiguity.jl") end
 @testset "System Construction Test" begin include("system_construction.jl") end