[repo] Clean up unused variables (#6100)

Co-authored-by: Mikel Blanchard <mblanchard@macrosssoftware.com>

examples/GrpcService/Services/GreeterService.cs

@@ -7,13 +7,6 @@ namespace Examples.GrpcService;
 
 public class GreeterService : Greeter.GreeterBase
 {
-    private readonly ILogger<GreeterService> logger;
-
-    public GreeterService(ILogger<GreeterService> logger)
-    {
-        this.logger = logger;
-    }
-
     public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
     {
         return Task.FromResult(new HelloReply

examples/MicroserviceExample/WebApi/Controllers/SendMessageController.cs

@@ -10,12 +10,10 @@ namespace WebApi.Controllers;
 [Route("[controller]")]
 public class SendMessageController : ControllerBase
 {
-    private readonly ILogger<SendMessageController> logger;
     private readonly MessageSender messageSender;
 
-    public SendMessageController(ILogger<SendMessageController> logger, MessageSender messageSender)
+    public SendMessageController(MessageSender messageSender)
     {
-        this.logger = logger;
         this.messageSender = messageSender;
     }
 

src/OpenTelemetry.Exporter.Zipkin/Implementation/ZipkinActivityConversionExtensions.cs

@@ -246,8 +246,6 @@ public void EnumerateTags(Activity activity)
 
     private struct EventEnumerationState
     {
-        public bool Created;
-
         public PooledList<ZipkinAnnotation> Annotations;
 
         public void EnumerateEvents(Activity activity)
@@ -257,7 +255,6 @@ public void EnumerateEvents(Activity activity)
             if (enumerator.MoveNext())
             {
                 this.Annotations = PooledList<ZipkinAnnotation>.Create();
-                this.Created = true;
 
                 do
                 {

test/OpenTelemetry.Tests/Trace/SamplersTest.cs

@@ -11,13 +11,11 @@ public class SamplersTest
 {
     private static readonly ActivityKind ActivityKindServer = ActivityKind.Server;
     private readonly ActivityTraceId traceId;
-    private readonly ActivitySpanId spanId;
     private readonly ActivitySpanId parentSpanId;
 
     public SamplersTest()
     {
         this.traceId = ActivityTraceId.CreateRandom();
-        this.spanId = ActivitySpanId.CreateRandom();
         this.parentSpanId = ActivitySpanId.CreateRandom();
     }