dropdown-list-widget: Remove dropdown-list-body class and reference.

Removes the "dropdown-list-body" class and references as it is no
longer used in the new DropdownWidget. The previous uses of the
class were removed in commit 875d564f2d.

web/src/ui_init.js

@@ -302,11 +302,8 @@ export function initialize_kitchen_sink_stuff() {
 
     // Ignore wheel events in the compose area which weren't already handled above.
     $("#compose").on("wheel", (e) => {
-        // Except for the stream select dropdown and compose banners, which still needs scroll events.
+        // Except for the compose banners, which still need scroll events.
-        if (
+        if ($(e.target).closest("#compose_banners").length) {
-            $(e.target).closest(".dropdown-list-body").length ||
-            $(e.target).closest("#compose_banners").length
-        ) {
             return;
         }
         e.stopPropagation();

web/styles/settings.css

@@ -1586,44 +1586,6 @@ $option_title_width: 180px;
         margin-top: 0;
         display: block;
     }
-
-    .dropdown-list-body {
-        position: relative;
-        margin-top: 0;
-        display: block;
-
-        /* In bootstrap v2.3.2, we strictly need
-        .dropdown-menu > li > a as the order of the elements
-        for the bootstrap style to be applied.
-        Since we use a combination of dropdown + simplebar here,
-        the structure cannot be possible since simplebar inserts
-        elements of its own, so we copy over that style
-        from bootstrap to here. */
-        & li a {
-            display: block;
-            padding: 3px 20px;
-            clear: both;
-            font-weight: normal;
-            line-height: 20px;
-            color: hsl(0deg 0% 20%);
-            white-space: nowrap;
-
-            &:hover {
-                color: hsl(0deg 0% 100%);
-                text-decoration: none;
-                background-color: hsl(200deg 100% 38%);
-                background-image: linear-gradient(
-                    to bottom,
-                    hsl(200deg 100% 40%),
-                    hsl(200deg 100% 35%)
-                );
-            }
-
-            &:focus {
-                text-decoration: none;
-            }
-        }
-    }
 }
 
 .subsection-failed-status p {