[css-align-3] Remove mention of row/column axes.

Author: fantasai

css-align-3/Overview.bs

@@ -1034,12 +1034,12 @@ The 'justify-content' and 'align-content' Properties</h3>
 		<tr>
 			<th>'align-content' Axis
 			<td>
-				The <a lt="block axis">block (column) axis</a>,
+				The <a>block axis</a>,
 				aligning the <a>grid rows</a>.
 		<tr>
 			<th>'justify-content' Axis
 			<td>
-				The <a lt="inline axis">inline (row) axis</a>,
+				The <a>inline axis</a>,
 				aligning the <a>grid columns</a>.
 		<tr>
 			<th>''justify-content/normal'' Behavior