remove unnecessary initializations

plugins/inputs/smart/smart_test.go

@@ -140,7 +140,7 @@ func TestGatherInParallelMode(t *testing.T) {
 		require.NoError(t, err)
 
 		result := acc.GetTelegrafMetrics()
-		testutil.RequireMetricsEqual(t, make([]telegraf.Metric, 0), result)
+		require.Empty(t, result)
 	})
 }
 

plugins/inputs/snmp/snmp_test.go

@@ -676,7 +676,6 @@ func TestSnmpInit_noTranslateGosmi(t *testing.T) {
 				}},
 		},
 		ClientConfig: snmp.ClientConfig{
-			Path:       make([]string, 0),
 			Translator: "gosmi",
 		},
 	}

plugins/inputs/stackdriver/stackdriver.go

@@ -714,11 +714,10 @@ func (s *stackdriver) addDistribution(dist *distributionpb.Distribution, tags ma
 func init() {
 	inputs.Add("stackdriver", func() telegraf.Input {
 		return &stackdriver{
-			CacheTTL:                        defaultCacheTTL,
-			RateLimit:                       defaultRateLimit,
-			Delay:                           defaultDelay,
-			GatherRawDistributionBuckets:    true,
-			DistributionAggregationAligners: make([]string, 0),
+			CacheTTL:                     defaultCacheTTL,
+			RateLimit:                    defaultRateLimit,
+			Delay:                        defaultDelay,
+			GatherRawDistributionBuckets: true,
 		}
 	})
 }

plugins/inputs/stackdriver/stackdriver_test.go

@@ -64,11 +64,10 @@ func (m *MockStackdriverClient) Close() error {
 
 func TestInitAndRegister(t *testing.T) {
 	expected := &stackdriver{
-		CacheTTL:                        defaultCacheTTL,
-		RateLimit:                       defaultRateLimit,
-		Delay:                           defaultDelay,
-		GatherRawDistributionBuckets:    true,
-		DistributionAggregationAligners: make([]string, 0),
+		CacheTTL:                     defaultCacheTTL,
+		RateLimit:                    defaultRateLimit,
+		Delay:                        defaultDelay,
+		GatherRawDistributionBuckets: true,
 	}
 	require.Equal(t, expected, inputs.Inputs["stackdriver"]())
 }

plugins/inputs/supervisor/supervisor_test.go

@@ -103,9 +103,7 @@ func TestShort_SampleData(t *testing.T) {
 	for _, tC := range testCases {
 		t.Run(tC.desc, func(t *testing.T) {
 			s := &Supervisor{
-				Server:     "http://example.org:9001/RPC2",
-				MetricsInc: make([]string, 0),
-				MetricsExc: make([]string, 0),
+				Server: "http://example.org:9001/RPC2",
 			}
 			status := supervisorInfo{
 				StateCode: tC.supervisorData.StateCode,
@@ -152,9 +150,7 @@ func TestIntegration_BasicGathering(t *testing.T) {
 	require.NoError(t, err, "failed to start container")
 	defer ctr.Terminate()
 	s := &Supervisor{
-		Server:     "http://login:pass@" + testutil.GetLocalHost() + ":" + ctr.Ports[supervisorPort] + "/RPC2",
-		MetricsInc: make([]string, 0),
-		MetricsExc: make([]string, 0),
+		Server: "http://login:pass@" + testutil.GetLocalHost() + ":" + ctr.Ports[supervisorPort] + "/RPC2",
 	}
 	err = s.Init()
 	require.NoError(t, err, "failed to run Init function")

plugins/inputs/varnish/varnish.go

@@ -408,7 +408,6 @@ func init() {
 			UseSudo:         false,
 			InstanceName:    "",
 			Timeout:         defaultTimeout,
-			Regexps:         make([]string, 0),
 		}
 	})
 }