traefik: remove v1

[ldez]

Related to #14607

We stopped to support Traefik v1 for 2 years now so that we can drop it.

[github-actions]

Diff for 6f508c9:

diff --git a/_bashbrew-cat b/_bashbrew-cat
index e85712e..a8190e2 100644
--- a/_bashbrew-cat
+++ b/_bashbrew-cat
@@ -1,24 +1,5 @@
 Maintainers: Ludovic Fernandez <ludovic@traefik.io> (@ldez), Julien Salleyron <julien@traefik.io> (@juliens), Romain Tribotté <romain.tribotte@traefik.io> (@rtribotte), Michael Matur <michael@traefik.io> (@mmatur), Kevin Pollet <kevin.pollet@traefik.io> (@kevinpollet), Tom Moulard <tom.moulard@traefik.io> (@tommoulard)
 
-Tags: v1.7.34, 1.7.34, v1.7, 1.7, maroilles
-Architectures: amd64, arm32v6, arm64v8
-GitRepo: https://github.com/traefik/traefik-library-image.git
-GitCommit: 4434758cf14bbd1ec9511b3f2a37b0a6ce846db6
-Directory: scratch
-
-Tags: v1.7.34-alpine, 1.7.34-alpine, v1.7-alpine, 1.7-alpine, maroilles-alpine
-Architectures: amd64, arm32v6, arm64v8
-GitRepo: https://github.com/traefik/traefik-library-image.git
-GitCommit: 4434758cf14bbd1ec9511b3f2a37b0a6ce846db6
-Directory: alpine
-
-Tags: v1.7.34-windowsservercore-1809, 1.7.34-windowsservercore-1809, v1.7-windowsservercore-1809, 1.7-windowsservercore-1809, maroilles-windowsservercore-1809
-Architectures: windows-amd64
-GitRepo: https://github.com/traefik/traefik-library-image.git
-GitCommit: 4434758cf14bbd1ec9511b3f2a37b0a6ce846db6
-Directory: windows/1809
-Constraints: windowsservercore-1809
-
 Tags: v2.10.1, 2.10.1, v2.10, 2.10, saintmarcelin, latest
 Architectures: amd64, arm32v6, arm64v8, s390x
 GitRepo: https://github.com/traefik/traefik-library-image.git
diff --git a/_bashbrew-list b/_bashbrew-list
index 72ff97f..95aa101 100644
--- a/_bashbrew-list
+++ b/_bashbrew-list
@@ -1,9 +1,3 @@
-traefik:1.7
-traefik:1.7-alpine
-traefik:1.7-windowsservercore-1809
-traefik:1.7.34
-traefik:1.7.34-alpine
-traefik:1.7.34-windowsservercore-1809
 traefik:2.10
 traefik:2.10-windowsservercore-1809
 traefik:2.10.1
@@ -15,17 +9,8 @@ traefik:3.0.0-beta2-windowsservercore-1809
 traefik:beaufort
 traefik:beaufort-windowsservercore-1809
 traefik:latest
-traefik:maroilles
-traefik:maroilles-alpine
-traefik:maroilles-windowsservercore-1809
 traefik:saintmarcelin
 traefik:saintmarcelin-windowsservercore-1809
-traefik:v1.7
-traefik:v1.7-alpine
-traefik:v1.7-windowsservercore-1809
-traefik:v1.7.34
-traefik:v1.7.34-alpine
-traefik:v1.7.34-windowsservercore-1809
 traefik:v2.10
 traefik:v2.10-windowsservercore-1809
 traefik:v2.10.1
diff --git a/_bashbrew-list-build-order b/_bashbrew-list-build-order
index 9eafcce..d6a65bf 100644
--- a/_bashbrew-list-build-order
+++ b/_bashbrew-list-build-order
@@ -1,7 +1,4 @@
-traefik:maroilles-alpine
-traefik:maroilles-windowsservercore-1809
 traefik:latest
 traefik:windowsservercore-1809
 traefik:beaufort
 traefik:beaufort-windowsservercore-1809
-traefik:maroilles
diff --git a/traefik_maroilles-alpine/Dockerfile b/traefik_maroilles-alpine/Dockerfile
deleted file mode 100644
index d677d41..0000000
diff --git a/traefik_maroilles-alpine/entrypoint.sh b/traefik_maroilles-alpine/entrypoint.sh
deleted file mode 100755
index 72b0b69..0000000
diff --git a/traefik_maroilles-windowsservercore-1809/Dockerfile b/traefik_maroilles-windowsservercore-1809/Dockerfile
deleted file mode 100644
index d7b8f32..0000000
diff --git a/traefik_maroilles/Dockerfile b/traefik_maroilles/Dockerfile
deleted file mode 100644
index f4bd0c5..0000000

Relevant Maintainers:

• traefik: @ldez @juliens @rtribotte @mmatur @kevinpollet @tomMoulard

[mmatur]

LGTM