Remove the append-right-32 CSS class

This removes the append-right-32 CSS class
and replaces it for the gl-mr-7 utility
class from GitLab-UI

app/assets/javascripts/pipelines/components/graph/linked_pipelines_column.vue

@@ -28,7 +28,7 @@ export default {
     columnClass() {
       const positionValues = {
         right: 'prepend-left-64',
-        left: 'append-right-32',
+        left: 'gl-mr-7',
       };
       return `graph-position-${this.graphPosition} ${positionValues[this.graphPosition]}`;
     },

app/assets/stylesheets/framework/common.scss

@@ -415,7 +415,6 @@ img.emoji {
 .append-right-15 { margin-right: 15px; }
 .append-right-default { margin-right: $gl-padding; }
 .append-right-20 { margin-right: 20px; }
-.append-right-32 { margin-right: 32px; }
 .append-right-48 { margin-right: 48px; }
 .prepend-right-32 { margin-right: 32px; }
 .append-bottom-5 { margin-bottom: 5px; }