Bug 569247: remove topic attribute

Change-Id: If69c9892c4df35879bc7ea047416b4a542b226ce
Signed-off-by: Martin Weber <fifteenknots505@gmail.com>
diff --git a/cmake/org.eclipse.cdt.cmake.is.core.doc/doc/toc.xml b/cmake/org.eclipse.cdt.cmake.is.core.doc/doc/toc.xml
index 9b13f17..740953f 100644
--- a/cmake/org.eclipse.cdt.cmake.is.core.doc/doc/toc.xml
+++ b/cmake/org.eclipse.cdt.cmake.is.core.doc/doc/toc.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<toc label="CDT CMake User Guide" topic="doc/html/home.html">
+<toc label="CDT CMake User Guide">
    <topic label="Tasks">
       <link toc="doc/topics_Tasks.xml"/>
    </topic>