Remove unused scss file

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

src/renderer/components/layout/sidebar-item.scss

@@ -1,97 +0,0 @@
-/**
- * Copyright (c) OpenLens Authors. All rights reserved.
- * Licensed under MIT License. See LICENSE in root directory for more information.
- */
-
-.SidebarItem {
-
-  display: flex;
-  flex-direction: column;
-  flex-shrink: 0;
-  width: 100%;
-  user-select: none;
-
-  > .nav-item {
-    text-decoration: none;
-    padding: $unit * 0.3846 $unit * 0.625; // ≈ floor($unit / 2.6) floor($unit / 1.6)
-    width: 100%;
-    height: 100%;
-    color: inherit;
-    cursor: pointer;
-
-    > .link-text {
-      overflow: hidden;
-      text-overflow: ellipsis;
-      white-space: nowrap;
-    }
-
-    .expand-icon {
-      --size: 20px;
-    }
-  }
-
-  .sub-menu {
-    $borderSize: 4px;
-    border-left: $borderSize solid transparent;
-
-    > .SidebarItem {
-      color: var(--textColorPrimary);
-      padding-left: 30px + $borderSize;
-      line-height: 22px;
-
-      .SidebarItem {
-        padding-left: $padding * 2; // 3rd+ menu level
-      }
-
-      .nav-item {
-        &.expandable {
-          font-weight: 500;
-        }
-      }
-    }
-  }
-}
-
-// TODO: Make less flaky.
-.sidebar-active-status {
-  > .SidebarItem {
-    .nav-item {
-      &.active, &:hover {
-        background: var(--blue);
-        color: var(--sidebarActiveColor);
-      }
-    }
-
-    .sub-menu {
-      &.active {
-        border-left-color: var(--blue);
-      }
-
-      > .SidebarItem {
-        .nav-item {
-          &.active, &:hover {
-            color: var(--sidebarSubmenuActiveColor);
-            background: none;
-          }
-
-          &.expandable {
-            color: var(--textColorPrimary)
-          }
-        }
-
-        .sub-menu {
-          &.active {
-            border-left-color: transparent;
-          }
-
-          .nav-item {
-            &.active, &:hover {
-              color: var(--sidebarSubmenuActiveColor);
-              background: none;
-            }
-          }
-        }
-      }
-    }
-  }
-}