diff --git a/djblets/static/djblets/css/datagrid.less b/djblets/static/djblets/css/datagrid.less
index c0cb2345f3952f92dd650d6126609103368dbc2f..4496326c78f3018e04a06142a24050796237264a 100644
--- a/djblets/static/djblets/css/datagrid.less
+++ b/djblets/static/djblets/css/datagrid.less
@@ -296,94 +296,6 @@
 }
 
 
-/****************************************************************************
- * Column-specific classes
- ****************************************************************************/
-.datagrid {
-  .age1 {
-    background-color: #beedbc;
-    border-left: 1px #8bbd5c solid;
-    border-right: 1px #8bbd5c solid;
-    white-space: nowrap;
-
-    &:hover {
-      background-color: #a1cb9f;
-    }
-  }
-
-  tr.even .age1 {
-    background-color: #b4e3b2;
-  }
-
-  .age2 {
-    background-color: #ddfa8e;
-    border-left: 1px #a3e266 solid;
-    border-right: 1px #a3e266 solid;
-    white-space: nowrap;
-
-    &:hover {
-      background-color: #bcd675;
-    }
-  }
-
-  tr.even .age2 {
-    background-color: #d3f084;
-  }
-
-  .age3 {
-    background-color: #fdf18c;
-    border-left: 1px #d8c158 solid;
-    border-right: 1px #d8c158 solid;
-    white-space: nowrap;
-
-    &:hover {
-      background-color: #d9ce74;
-    }
-  }
-
-  tr.even .age3 {
-    background-color: #f3e782;
-  }
-
-  .age4 {
-    background-color: #fed3a9;
-    border-left: 1px #d49659 solid;
-    border-right: 1px #d49659 solid;
-    white-space: nowrap;
-
-    &:hover {
-      background-color: #dab38e;
-    }
-  }
-
-  tr.even .age4 {
-    background-color: #f4c99f;
-  }
-
-  .age5 {
-    background-color: #fab6b6;
-    border-left: 1px #f56363 solid;
-    border-right: 1px #f56363 solid;
-    white-space: nowrap;
-
-    &:hover {
-      background-color: #d69999;
-    }
-  }
-
-  tr.even .age5 {
-    background-color: #f0acac;
-  }
-
-  tr.month {
-    background-color: #E9E9E9;
-  }
-
-  td.summary {
-    cursor: pointer;
-  }
-}
-
 .datagrid-head,
 .datagrid-body {
   border-collapse: collapse;