Remove seelog replace directives and references (#45807)

### What does this PR do?
Remove more seelog references.
In particular the replace directives in go.mod files are useless now.

### Motivation
Cleanup. Eventually remove all references.

### Describe how you validated your changes
CI

### Additional Notes
Seelog is still imported in `test/system/dogstatd`, I'll look into removing this separately, so that it disappears from the go.mod entirely.

Co-authored-by: pierre.gimalac <pierre.gimalac@datadoghq.com>

Author: pgimalac

.github/dependabot.yaml

@@ -11,7 +11,6 @@ updates:
       # These dependencies are replaced in the main go.mod file.
       # They are ignored since bumping them would have no effect on the build.
       # To update them automatically, it is necessary to remove the `replace` directive.
-      - dependency-name: github.com/cihub/seelog  # https://github.com/DataDog/datadog-agent/pull/5647
       - dependency-name: github.com/spf13/cast
       # We only replace github.com/docker/distribution but we ignore all Docker dependencies.
       # Ignore internal modules

.golangci.yml

@@ -51,10 +51,10 @@ linters:
               desc: "use the v2 sdk instead"
         logger:
           files:
-            - "!**/pkg/util/log/**"
+            - $all
           deny:
             - pkg: "github.com/cihub/seelog"
-              desc: "seelog should not be used directly. Use `pkg/util/log` instead."
+              desc: "seelog should not be used. Use `pkg/util/log` instead."
         pkgconfigusage:
           files:
             - "**/comp/**"
@@ -220,7 +220,6 @@ linters:
         - (github.com/DataDog/datadog-agent/comp/core/log/def.Component).Warnf
         - (net/http.ResponseWriter).Write
         - fmt.Sscanf
-        - github.com/cihub/seelog.Warnf
         - github.com/DataDog/datadog-agent/pkg/util/log.ChangeLogLevel
         - github.com/DataDog/datadog-agent/pkg/util/log.Critical
         - github.com/DataDog/datadog-agent/pkg/util/log.Criticalc

LICENSE-3rdparty.csv

@@ -669,6 +669,10 @@ core,github.com/charlievieth/strcase/internal/bytealg,MIT,Copyright 2024 Charlie
 core,github.com/charlievieth/strcase/internal/tables,MIT,Copyright 2024 Charlie Vieth
 core,github.com/chrusty/protoc-gen-jsonschema,Apache-2.0,Copyright (c) 2017 The Authors
 core,github.com/cihub/seelog,BSD-3-Clause,"Copyright (c) 2012, Cloud Instruments Co., Ltd. <info@cin.io>"
+core,github.com/cihub/seelog/archive,BSD-3-Clause,"Copyright (c) 2012, Cloud Instruments Co., Ltd. <info@cin.io>"
+core,github.com/cihub/seelog/archive/gzip,BSD-3-Clause,"Copyright (c) 2012, Cloud Instruments Co., Ltd. <info@cin.io>"
+core,github.com/cihub/seelog/archive/tar,BSD-3-Clause,"Copyright (c) 2012, Cloud Instruments Co., Ltd. <info@cin.io>"
+core,github.com/cihub/seelog/archive/zip,BSD-3-Clause,"Copyright (c) 2012, Cloud Instruments Co., Ltd. <info@cin.io>"
 core,github.com/cilium/ebpf,MIT,"Copyright (c) 2017 Nathan Sweet | Copyright (c) 2018, 2019 Cloudflare | Copyright (c) 2019 Authors of Cilium"
 core,github.com/cilium/ebpf/asm,MIT,"Copyright (c) 2017 Nathan Sweet | Copyright (c) 2018, 2019 Cloudflare | Copyright (c) 2019 Authors of Cilium"
 core,github.com/cilium/ebpf/btf,MIT,"Copyright (c) 2017 Nathan Sweet | Copyright (c) 2018, 2019 Cloudflare | Copyright (c) 2019 Authors of Cilium"

comp/forwarder/orchestrator/orchestratorinterface/go.mod

@@ -5,10 +5,7 @@ go 1.24.0
 require github.com/DataDog/datadog-agent/comp/forwarder/defaultforwarder v0.56.0-rc.3
 
 // Internal deps fix version
-replace (
-	github.com/cihub/seelog => github.com/cihub/seelog v0.0.0-20151216151435-d2c6e5aa9fbf // v2.6
-	github.com/spf13/cast => github.com/DataDog/cast v1.8.0
-)
+replace github.com/spf13/cast => github.com/DataDog/cast v1.8.0
 
 require (
 	github.com/DataDog/datadog-agent/comp/api/api/def v0.72.0-rc.1 // indirect

docs/public/guidelines/languages/go.md

@@ -229,6 +229,6 @@ func TestThingFunctionality(t *testing.T) {
 
 ## Logging
 
-Logging utilizes the [`github.com/cihub/seelog`](https://github.com/cihub/seelog) package as its underlying framework.
+Logging utilizes the [`log/slog`](https://pkg.go.dev/log/slog) package as its underlying framework.
 You can access logging through `pkg/util/log` and the `comp/core/log` component wrappers.
 Using the component wrapper is recommended, as it adheres to [component best practices](https://datadoghq.dev/datadog-agent/components/overview/).

go.mod

@@ -17,7 +17,6 @@ retract (
 
 // Internal deps fix version
 replace (
-	github.com/cihub/seelog => github.com/cihub/seelog v0.0.0-20151216151435-d2c6e5aa9fbf // v2.6
 	// Use a patched version of go-cmp to avoid disabling dead code elimination
 	// Commit from https://github.com/DataDog/go-cmp/tree/dce-patch/v0.7.0
 	github.com/google/go-cmp => github.com/DataDog/go-cmp v0.0.0-20250605161605-8f326bf2ab9d

go.sum

@@ -2,8 +2,6 @@ module github.com/DataDog/datadog-agent/pkg/util/log
 
 go 1.24.0
 
-replace github.com/cihub/seelog => github.com/cihub/seelog v0.0.0-20151216151435-d2c6e5aa9fbf // v2.6
-
 require (
 	github.com/DataDog/datadog-agent/pkg/template v0.64.1
 	github.com/DataDog/datadog-agent/pkg/util/scrubber v0.64.1

pkg/util/log/go.mod

@@ -2,8 +2,6 @@ module github.com/DataDog/datadog-agent/pkg/util/log/setup
 
 go 1.24.0
 
-replace github.com/cihub/seelog => github.com/cihub/seelog v0.0.0-20151216151435-d2c6e5aa9fbf // v2.6
-
 require (
 	github.com/DataDog/datadog-agent/pkg/config/mock v0.61.0
 	github.com/DataDog/datadog-agent/pkg/config/model v0.72.2