Revert "feat: make agent stats' cardinality configurable (#12468)" (#12533)

This reverts commit 21d1873d97.

coderd/agentmetrics/labels.go

@@ -1,38 +0,0 @@
-package agentmetrics
-
-import (
-	"strings"
-
-	"golang.org/x/xerrors"
-)
-
-const (
-	LabelAgentName     = "agent_name"
-	LabelTemplateName  = "template_name"
-	LabelUsername      = "username"
-	LabelWorkspaceName = "workspace_name"
-)
-
-var (
-	LabelAll        = []string{LabelAgentName, LabelTemplateName, LabelUsername, LabelWorkspaceName}
-	LabelAgentStats = []string{LabelAgentName, LabelUsername, LabelWorkspaceName}
-)
-
-// ValidateAggregationLabels ensures a given set of labels are valid aggregation labels.
-func ValidateAggregationLabels(labels []string) error {
-	acceptable := LabelAll
-
-	seen := make(map[string]any, len(acceptable))
-	for _, label := range acceptable {
-		seen[label] = nil
-	}
-
-	for _, label := range labels {
-		if _, found := seen[label]; !found {
-			return xerrors.Errorf("%q is not a valid aggregation label; only one or more of %q are acceptable",
-				label, strings.Join(acceptable, ", "))
-		}
-	}
-
-	return nil
-}

coderd/agentmetrics/labels_test.go

@@ -1,53 +0,0 @@
-package agentmetrics_test
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/require"
-
-	"github.com/coder/coder/v2/coderd/agentmetrics"
-)
-
-func TestValidateAggregationLabels(t *testing.T) {
-	t.Parallel()
-
-	tests := []struct {
-		name        string
-		labels      []string
-		expectedErr bool
-	}{
-		{
-			name: "empty list is valid",
-		},
-		{
-			name:   "single valid entry",
-			labels: []string{agentmetrics.LabelTemplateName},
-		},
-		{
-			name:   "multiple valid entries",
-			labels: []string{agentmetrics.LabelTemplateName, agentmetrics.LabelUsername},
-		},
-		{
-			name:   "repeated valid entries are not invalid",
-			labels: []string{agentmetrics.LabelTemplateName, agentmetrics.LabelUsername, agentmetrics.LabelUsername, agentmetrics.LabelUsername},
-		},
-		{
-			name:        "empty entry is invalid",
-			labels:      []string{""},
-			expectedErr: true,
-		},
-	}
-
-	for _, tc := range tests {
-		tc := tc
-
-		t.Run(tc.name, func(t *testing.T) {
-			t.Parallel()
-
-			err := agentmetrics.ValidateAggregationLabels(tc.labels)
-			if tc.expectedErr {
-				require.Error(t, err)
-			}
-		})
-	}
-}