Remove Gurobi from test dependencies; remove large tests

test/model/formulations_test.jl

@@ -17,11 +17,7 @@ import UnitCommitment:
     XavQiuWanThi2019,
     WanHob2016
 
-if ENABLE_LARGE_TESTS
-    using Gurobi
-end
-
-function _small_test(
+function _test(
     formulation::Formulation;
     instances::Array{String} = ["test/case14"],
     optimizer = optimizer_with_attributes(Cbc.Optimizer, "logLevel" => 0),
@@ -42,32 +38,6 @@ function _small_test(
     end
 end
 
-function _large_test(formulation::Formulation)::Nothing
-    instances = ["pglib-uc/ca/Scenario400_reserves_1"]
-    for instance in instances
-        instance = UnitCommitment.read_benchmark(instance)
-        model = UnitCommitment.build_model(
-            instance = instance,
-            formulation = formulation,
-            optimizer = Gurobi.Optimizer,
-        )
-        UnitCommitment.optimize!(
-            model,
-            XavQiuWanThi2019.Method(two_phase_gap = false, gap_limit = 0.1),
-        )
-        solution = UnitCommitment.solution(model)
-        @test UnitCommitment.validate(instance, solution)
-    end
-    return
-end
-
-function _test(formulation::Formulation)::Nothing
-    _small_test(formulation)
-    if ENABLE_LARGE_TESTS
-        _large_test(formulation)
-    end
-end
-
 @testset "formulations" begin
     _test(Formulation())
     _test(Formulation(ramping = ArrCon2000.Ramping()))
@@ -83,7 +53,7 @@ end
     _test(Formulation(pwl_costs = Gar1962.PwlCosts()))
     _test(Formulation(pwl_costs = CarArr2006.PwlCosts()))
     _test(Formulation(pwl_costs = KnuOstWat2018.PwlCosts()))
-    _small_test(
+    _test(
         Formulation(ramping = WanHob2016.Ramping()),
         instances = ["test/case14-flex"],
     )