Remove support for test case descriptions

Closes #1189

docs/release-notes.md

@@ -40,6 +40,8 @@
 * `--list*` commands are now piped through the reporters
   * The top-level reporter interface provides default implementation that works just as the old one
   * XmlReporter outputs a machine-parseable XML
+* `TEST_CASE` description support has been removed
+  * If the second argument has text outside tags, the text will be ignored.
 
 ### Fixes
 * The `INFO` macro no longer contains superfluous semicolon (#1456)