remove .all-contributorsrc file

.all-contributorsrc

@@ -1,26 +0,0 @@
-{
-  "files": [
-    "CONTRIBUTORS.md"
-  ],
-  "imageSize": 100,
-  "commit": false,
-  "contributors": [
-    {
-      "login": "matrixes",
-      "name": "matrixes",
-      "avatar_url": "https://avatars.githubusercontent.com/u/46491408?v=4",
-      "profile": "https://github.com/matrixes",
-      "contributions": [
-        "blog"
-      ]
-    }
-  ],
-  "contributorsPerLine": 7,
-  "badgeTemplate": "",
-  "projectName": "docker-mailserver",
-  "projectOwner": "docker-mailserver",
-  "repoType": "github",
-  "repoHost": "https://github.com",
-  "skipCi": false,
-  "commitConvention": "none"
-}

.gitattributes

@@ -28,7 +28,6 @@ Makefile
 *.yaml              text
 
 ## PROJECT
-.all-contributorsrc text export-ignore
 .editorconfig       text export-ignore
 .gitattributes      text export-ignore
 .gitignore          text export-ignore