MAGETWO-98251 Remove additional nesting

Author: ptylek

app/design/frontend/Magento/blank/web/css/source/_layout.less

@@ -125,16 +125,14 @@
     }
 
     .page-layout-2columns-left {
-        .page-layout-2columns-left {
-            .main {
-                padding-left: @layout-column__additional-sidebar-offset
-            }
-
-            .sidebar-additional {
-                clear: left;
-                float: left;
-                padding-left: 0;
-            }
+        .main {
+            padding-left: @layout-column__additional-sidebar-offset
+        }
+
+        .sidebar-additional {
+            clear: left;
+            float: left;
+            padding-left: 0;
         }
     }
 

app/design/frontend/Magento/luma/Magento_Catalog/web/css/source/_module.less

@@ -397,7 +397,6 @@
 
     .box-tocart {
         &:extend(.abs-box-tocart all);
-
         .field.qty {
         }