Revert "Merge branch '7861-cross-project-pipeline-dashboard-mvc-ce-backport' into 'master'"

This reverts commit 99b813dd, reversing
changes made to bc6cc878.

app/assets/stylesheets/components/dashboard_skeleton.scss

-.dashboard-cards {
-  margin-right: -$gl-padding-8;
-  margin-left: -$gl-padding-8;
-}
-
-.dashboard-card {
-  &-header {
-    &-warning {
-      background-color: $orange-100;
-    }
-
-    &-failed {
-      background-color: $red-100;
-    }
-  }
-
-  &-body {
-    height: 120px;
-
-    &-warning {
-      background-color: $orange-50;
-    }
-
-    &-failed {
-      background-color: $red-50;
-    }
-  }
-
-  &-time-ago {
-    &-icon {
-      color: $gray-500;
-    }
-  }
-
-  &-footer {
-    border-radius: $gl-padding;
-    height: $gl-padding-32;
-
-    &-failed {
-      background-color: $red-100;
-    }
-
-    &-arrow {
-      color: $gray-300;
-    }
-
-    &-downstream {
-      margin-right: -$gl-padding-8;
-    }
-
-    &-extra {
-      background-color: $gray-400;
-      font-size: 10px;
-      line-height: $gl-line-height;
-      width: $gl-padding;
-    }
-  }
-
-  &-skeleton-info {
-    border-radius: $gl-padding;
-    height: $gl-padding;
-    overflow: hidden;
-
-    &::after {
-      content: ' ';
-      display: block;
-      animation: blockTextShine 1s linear infinite forwards;
-      background-repeat: no-repeat;
-      background-size: cover;
-      background-image: linear-gradient(to right,
-      $gray-100 0%,
-      $gray-50 20%,
-      $gray-100 40%,
-      $gray-100 100%);
-      border-radius: $gl-padding;
-      height: $gl-padding;
-      margin-top: -$gl-padding-8;
-    }
-  }
-}