[css-writing-modes] Un-ref inline-start and inline-end as they refer to CSS 2.0, which are not auto-linkable for bikeshed

Author: Koji Ishii

css-writing-modes/Overview.bs

@@ -2265,7 +2265,7 @@ Table Caption Mappings: the 'caption-side' keywords</h3>
 
   <p>For implementations that do support side captions
     (i.e. the ''caption-side/left'' and ''caption-side/right'' values from the obsolete CSS&nbsp;2.0 specification [[CSS2]]),
-    this module also introduces the ''inline-start'' and ''inline-end'' values,
+    this module also introduces the 'inline-start' and 'inline-end' values,
     which behave similarly and which position the
     caption on the <i>inline-start</i> and <i>inline-end</i> sides of the table box,
     calculated with respect to the writing mode of the table box.