test: fix incorrect initial values in tests

Author: AayushSabharwal

test/nonlinearsystem.jl

@@ -293,7 +293,7 @@ sys = structural_simplify(ns; conservative = true)
     eqs = [0 ~ σ * (y - x)
            0 ~ x * (ρ - z) - y
            0 ~ x * y - β * z]
-    guesses = [x => 1.0, y => 0.0, z => 0.0]
+    guesses = [x => 1.0, z => 0.0]
     ps = [σ => 10.0, ρ => 26.0, β => 8 / 3]
     @mtkbuild ns = NonlinearSystem(eqs)
 

test/reduction.jl

@@ -158,9 +158,7 @@ eqs = [u1 ~ u2
 reducedsys = structural_simplify(sys)
 @test length(observed(reducedsys)) == 2
 
-u0 = [u1 => 1
-      u2 => 1
-      u3 => 0.3]
+u0 = [u2 => 1]
 pp = [2]
 nlprob = NonlinearProblem(reducedsys, u0, [p => pp[1]])
 reducedsol = solve(nlprob, NewtonRaphson())