all ant-col min-height setting

components/grid/style/index.less

@@ -61,6 +61,8 @@
 }
 
 .@{ant-prefix}-col {
+  // Prevent columns from collapsing when empty
+  min-height: 1px;
   position: relative;
 }
 

components/grid/style/mixin.less

@@ -22,8 +22,6 @@
   .col(@index, @list) when (@index > @grid-columns) {
     @{list} {
       position: relative;
-      // Prevent columns from collapsing when empty
-      min-height: 1px;
       padding-right: (@grid-gutter-width / 2);
       padding-left: (@grid-gutter-width / 2);
     }