Elastic: Remove redundant searchbar.less file

Searchbar styles has been moved to toolbar.less some time ago

skins/elastic/styles/widgets/searchbar.less

@@ -1,135 +0,0 @@
-/**
- * Roundcube webmail styles for the Elastic skin
- *
- * Copyright (c) 2017-2018, The Roundcube Dev Team
- *
- * The contents are subject to the Creative Commons Attribution-ShareAlike
- * License. It is allowed to copy, distribute, transmit and to adapt the work
- * by keeping credits to the original authors in the README.md file.
- * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
- */
-
-/*** Searchbar and searchoptions widgets ***/
-
-.searchbar {
-    height: @layout-searchbar-height;
-    line-height: @layout-searchbar-height;
-    background-color: @color-layout-header-background;
-    border-bottom: 1px solid @color-list-border;
-    display: flex;
-    align-items: center;
-    white-space: nowrap;
-    padding: 0 .5rem;
-    overflow: hidden;
-    position: relative;
-
-    form {
-        flex: 1;
-        display: flex;
-
-        &:before {
-            &:extend(.font-icon-class);
-            content: @fa-var-search;
-            height: @layout-searchbar-height;
-        }
-    }
-
-    input {
-        width: 100%;
-        border: 0;
-        background: transparent;
-        padding: .5rem;
-    }
-
-    a.button {
-        height: @layout-searchbar-height;
-        min-width: auto;
-
-        &:before {
-            &:extend(.font-icon-class);
-        }
-
-
-        &.options {
-            &:before {
-                content: @fa-var-filter;
-                font-size: 1em;
-            }
-        }
-
-        &.reset {
-            display: none;
-            position: absolute;
-            right: .5rem;
-
-            &:before {
-                content: @fa-var-times;
-                font-size: 1em;
-            }
-        }
-
-        &.options + .reset {
-            right: 2.5rem;
-        }
-
-        &.search {
-            display: none;
-        }
-    }
-
-    span.inner {
-        display: none;
-    }
-
-    &.active {
-        form:before {
-            color: @color-searchbar-icon-active;
-        }
-
-        a.button.reset {
-            display: inline;
-        }
-    }
-
-    &.open a.button.options:before {
-        content: @fa-var-angle-up;
-        font-size: 1.25em;
-        line-height: 1.25;
-    }
-}
-
-.searchoptions {
-    button.search {
-        width: 100%;
-    }
-
-    ul.proplist {
-        li {
-            margin: 0;
-        }
-
-        & + div {
-            margin-top: 1rem;
-        }
-    }
-
-    .input-group {
-        &:not(:last-child) {
-            margin-bottom: .5rem;
-        }
-
-        .input-group-prepend {
-            width: 30%;
-        }
-
-        label {
-            width: 100%;
-        }
-    }
-
-    .formbuttons {
-        // this is needed because we hide .formbuttons on small devices
-        // we don't want it for search options form
-        display: block !important;
-    }
-}