[css-align-3] Remove mention of row/column axis, since we removed them from Grid for being confusing. Fixes #1372 and #1299.

Author: tabatkins

css-align-3/Overview.bs

@@ -1396,7 +1396,7 @@ Inline/Main-Axis Alignment: the 'justify-self' property</h3>
 		<tr>
 			<th>'justify-self' Axis
 			<td>
-				The grid’s <a>row axis</a> ([=inline axis=]).
+				The grid’s [=inline axis=].
 		<tr>
 			<th><a>Alignment Container</a>
 			<td>
@@ -1584,7 +1584,7 @@ Block/Cross-Axis Alignment: the 'align-self' property</h3>
 		<tr>
 			<th>'align-self' Axis
 			<td>
-				The grid’s <a>column axis</a> ([=block axis=]).
+				The grid’s [=block axis=].
 		<tr>
 			<th><a>Alignment Container</a>
 			<td>
@@ -2080,7 +2080,7 @@ Determining the Baselines of a Box</h2>
 
 		<dt>table rows
 		<dd>
-			If any cells in the row participate in ''first baseline'' (''last baseline'') alignment along the row axis,
+			If any cells in the row participate in ''first baseline'' (''last baseline'') alignment along the [=inline axis=],
 			the first (last) [=baseline set=] of the row
 			is <a>generated</a> from their shared <a>alignment baseline</a>
 			and the row's <a>first available font</a>,