[css-text-3] Comment out tests that no longer apply

Author: frivoal

css-text-3/Overview.bs

@@ -417,8 +417,10 @@ Text Processing</h3>
     line-breaking/line-breaking-006.html
     line-breaking/line-breaking-007.html
     line-breaking/line-breaking-008.html
+    <!-- to be moved/removed together with the segment break transformation text
     white-space/seg-break-transformation-018.html
     white-space/seg-break-transformation-019.html
+    -->
     word-break/word-break-min-content-002.html
     word-break/word-break-min-content-003.html
     word-break/word-break-min-content-004.html
@@ -1527,7 +1529,9 @@ Order of Operations</h4>
           is removed.
 
           <wpt>
+          <!-- to be moved/removed together with the segment break transformation text
             white-space/seg-break-transformation-000.html
+          -->
             white-space/white-space-normal-011.html
             white-space/white-space-nowrap-011.html
           </wpt>