Remove redundant test

Author: MilesCranmer

test/test_tensor_operators.jl

@@ -52,5 +52,4 @@ c2 = Node(T; val=2.0)
 @test repr(c2) == "2.0"
 tree = Node(1, Node(1, c1, x1), c2)
 @test repr(tree) == "vec_add(vec_add([1.0, 2.0, 3.0], x1), 2.0)"
-tree(X, operators)
 @test tree(X, operators) == [5.0, 6.0, 7.0]