[service] move service.noopTraceProvider feature gate to deprecated stage

.chloggen/mark_noopTraceProvider_deprecated.yaml

@@ -0,0 +1,32 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: deprecation
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: service
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: move service.noopTraceProvider feature gate to deprecated stage
+
+# One or more tracking issues or pull requests related to the change
+issues: [13492]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: |
+  The functionality of the feature gate is available via configuration with the following telemetry settings:
+  ```
+  service:
+    telemetry:
+      traces:
+        level: none
+  ```
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

service/telemetry/tracer.go

@@ -19,7 +19,7 @@ import (
 )
 
 var noopTracerProvider = featuregate.GlobalRegistry().MustRegister("service.noopTracerProvider",
-	featuregate.StageAlpha,
+	featuregate.StageDeprecated,
 	featuregate.WithRegisterFromVersion("v0.107.0"),
 	featuregate.WithRegisterToVersion("v0.109.0"),
 	featuregate.WithRegisterDescription("Sets a Noop OpenTelemetry TracerProvider to reduce memory allocations. This featuregate is incompatible with the zPages extension."))

service/telemetry/tracer_test.go

@@ -11,7 +11,6 @@ import (
 	sdktrace "go.opentelemetry.io/otel/sdk/trace"
 
 	"go.opentelemetry.io/collector/config/configtelemetry"
-	"go.opentelemetry.io/collector/featuregate"
 )
 
 func TestNewTracerProvider(t *testing.T) {
@@ -30,25 +29,13 @@ func TestNewTracerProvider(t *testing.T) {
 			},
 			wantTracerProvider: &noopNoContextTracerProvider{},
 		},
-		{
-			name:               "noop tracer feature gate",
-			cfg:                Config{},
-			noopTracerGate:     true,
-			wantTracerProvider: &noopNoContextTracerProvider{},
-		},
 		{
 			name:               "tracer provider",
 			wantTracerProvider: &sdktrace.TracerProvider{},
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			previousValue := noopTracerProvider.IsEnabled()
-			// expect error due to deprecated flag
-			require.NoError(t, featuregate.GlobalRegistry().Set(noopTracerProvider.ID(), tt.noopTracerGate))
-			defer func() {
-				require.NoError(t, featuregate.GlobalRegistry().Set(noopTracerProvider.ID(), previousValue))
-			}()
 			sdk, err := config.NewSDK(config.WithOpenTelemetryConfiguration(config.OpenTelemetryConfiguration{TracerProvider: &config.TracerProvider{
 				Processors: tt.cfg.Traces.Processors,
 			}}))