Remove otelmacaron (#6186)

Resolve #5552

This package was deprecated in release
[v0.53.0](https://pkg.go.dev/go.opentelemetry.io/contrib/instrumentation/gopkg.in/macaron.v1/otelmacaron@v0.53.0)
on 2024-07-03. It is no longer supported and is being removed.

CHANGELOG.md

@@ -30,6 +30,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 - The `Minimum` field of the `LogProcessor` in `go.opentelemetry.io/contrib/processors/minsev` is removed.
   Use `NewLogProcessor` to configure this setting. (#6116)
+- The deprecated `go.opentelemetry.io/contrib/instrumentation/gopkg.in/macaron.v1/otelmacaron` package is removed. (#6186)
 - The deprecated `go.opentelemetry.io/contrib/samplers/aws/xray` package is removed. (#6187)
 
 <!-- Released section -->

CODEOWNERS

@@ -50,7 +50,6 @@ instrumentation/github.com/gorilla/mux/otelmux/                         @open-te
 instrumentation/github.com/labstack/echo/otelecho/                      @open-telemetry/go-approvers
 instrumentation/go.mongodb.org/mongo-driver/mongo/otelmongo/            @open-telemetry/go-approvers
 instrumentation/google.golang.org/grpc/otelgrpc/                        @open-telemetry/go-approvers @dashpole
-instrumentation/gopkg.in/macaron.v1/otelmacaron/                        @open-telemetry/go-approvers
 
 instrumentation/host/                                                   @open-telemetry/go-approvers @dmathieu
 instrumentation/net/http/httptrace/otelhttptrace/                       @open-telemetry/go-approvers @dmathieu

instrumentation/README.md

@@ -49,7 +49,6 @@ The following instrumentation packages are provided for popular Go packages and
 | [github.com/labstack/echo](./github.com/labstack/echo/otelecho) |  | ✓ |
 | [go.mongodb.org/mongo-driver](./go.mongodb.org/mongo-driver/mongo/otelmongo) |  | ✓ |
 | [google.golang.org/grpc](./google.golang.org/grpc/otelgrpc) | ✓ | ✓ |
-| [gopkg.in/macaron.v1](./gopkg.in/macaron.v1/otelmacaron) |  | ✓ |
 | [host](./host) | ✓ |  |
 | [net/http](./net/http/otelhttp) | ✓ | ✓ |
 | [net/http/httptrace](./net/http/httptrace/otelhttptrace) |  | ✓ |