Delete unused EE CSS

ee/app/assets/stylesheets/pages/ee_start_trial.scss

@@ -35,36 +35,3 @@
     opacity: 0.6;
   }
 }
-
-/* Trial License Install Modal */
-.modal-upload-trial-license {
-  .svg-container {
-    width: 90px;
-    height: 90px;
-  }
-
-  .trial-license-preview {
-    max-height: 300px;
-  }
-
-  /* Pure CSS License Key Preview Toggle */
-  .trial-license-preview,
-  .show-license,
-  .hide-license:target {
-    display: none;
-  }
-
-  .hide-license,
-  .hide-license:target + .show-license,
-  .hide-license:target ~ .trial-license-preview {
-    display: block;
-  }
-
-  .show-license,
-  .hide-license {
-    &:hover {
-      text-decoration: none;
-      color: $gray-900;
-    }
-  }
-}

ee/app/assets/stylesheets/pages/milestone.scss

@@ -42,11 +42,6 @@
   }
 }
 
-.burndown-docs-link {
-  color: inherit;
-  text-decoration: underline;
-}
-
 .burndown-header {
   margin: 24px 0 12px;
 

ee/app/assets/stylesheets/pages/projects.scss

-.protected-branch-push-access-list,
-.protected-branch-merge-access-list {
-  a {
-    color: $white;
-  }
-}
-
 .project-mirror-settings {
-  .ssh-public-key,
-  .btn-copy-ssh-public-key {
-    float: left;
-  }
-
-  .ssh-public-key {
-    width: 94%;
-    word-wrap: break-word;
-    word-break: break-all;
-  }
-
-  .btn-copy-ssh-public-key {
-    margin-left: 5px;
-  }
-
   .known-hosts {
     font-family: $monospace-font;
   }
@@ -38,16 +16,6 @@
   }
 }
 
-.load-wrapper {
-  position: absolute;
-  background: $black-transparent;
-  width: 100%;
-  height: 100%;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-}
-
 .project-mirror-text {
   @include media-breakpoint-up(sm) {
     float: left;

ee/app/assets/stylesheets/pages/promotions.scss

@@ -93,25 +93,6 @@
   }
 }
 
-.promotion-modal {
-  .modal-dialog {
-    width: 540px;
-  }
-
-  .modal-header {
-    border-bottom: 0;
-  }
-
-  .modal-body {
-    margin-top: -20px;
-    padding: 16px 16px 32px;
-  }
-
-  .modal-footer {
-    border-top: 0;
-  }
-}
-
 .promotion-issue-sidebar {
   .promotion-issue-sidebar-message {
     padding: $gl-padding-top;

ee/app/assets/stylesheets/pages/requirements.scss

 .requirements-container {
-  // Following overrides will be removed once
-  // we add filtered search bar on the page
-  // see https://gitlab.com/gitlab-org/gitlab/-/issues/212543
-  @include media-breakpoint-down(xs) {
-    .top-area {
-      border-bottom: 0;
-
-      .nav-links.mobile-separator {
-        margin-bottom: 0;
-      }
-    }
-  }
-
-  .requirement-form {
-    .requirement-form-textarea {
-      line-height: $gl-line-height-24;
-      // We need `!important` here as GlFormTextarea (based on `BFormTextarea`)
-      // somehow applies inline styles ¯\_(ツ)_/¯.
-      overflow-y: auto !important;
-    }
-  }
-
   .requirement-form-drawer {
     &.zen-mode {
       // We need to override `z-index` provided to GlDrawer