diff --git a/css/backoffice/components/_all.scss b/css/backoffice/components/_all.scss
index 8998ff7ed..5eded7c2d 100644
--- a/css/backoffice/components/_all.scss
+++ b/css/backoffice/components/_all.scss
@@ -22,5 +22,4 @@
 @import "fieldset";
 @import "field";
 @import "toolbar";
-@import "richtext";
-@import "compatibility";
\ No newline at end of file
+@import "richtext";
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diff --git a/css/backoffice/components/_compatibility.scss b/css/backoffice/components/_compatibility.scss
deleted file mode 100644
index d14569a13..000000000
--- a/css/backoffice/components/_compatibility.scss
+++ /dev/null
@@ -1,32 +0,0 @@
-/*!
- * copyright   Copyright (C) 2010-2020 Combodo SARL
- * license     http://opensource.org/licenses/AGPL-3.0
- */
-
-/*
- * For compatibility with extensions before 3.0.0
- */
-
-fieldset {
-  &:not(.ibo-fieldset) {
-    @extend %ibo-font-ral-nor-150;
-    margin: 10px;
-
-    & legend {
-      width: $ibo-fieldset--legend--width;
-      margin-bottom: $ibo-fieldset--legend--margin-bottom;
-      padding-bottom: $ibo-fieldset--legend--padding-bottom;
-      border-bottom: $ibo-fieldset--legend--border-bottom-size $ibo-fieldset--legend--border-bottom-style $ibo-fieldset--legend--border-bottom-color;
-
-      @extend %ibo-font-ral-med-250;
-    }
-  }
-}
-
-.field_label.label {
-  @extend %ibo-font-ral-nor-150;
-}
-
-.field_data {
-  @extend %ibo-font-ral-nor-150;
-}
\ No newline at end of file