diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 79f8e15..573edbd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -64,5 +64,4 @@ doc:
   tags:
     - shell
   script:
-  - scripts/doc.sh
-  
\ No newline at end of file
+  - scripts/doc.sh clean # 'clean' better clean before generating documentation
\ No newline at end of file
diff --git a/src/core/core.h b/src/core/core.h
index d8bdc17..fe266de 100644
--- a/src/core/core.h
+++ b/src/core/core.h
@@ -1,25 +1,5 @@
 #pragma once
 
-
-/** @page "Core SDK"
-@m_class{m-block m-success} @par How to get the answer
-@parblock
-    It's simple:
-
-    @m_class{m-code-figure} @parblock
-        @code{.cpp}
-        // this is the code
-        printf("The answer to the universe and everything is %d.", 5*9);
-        @endcode
-
-        @code{.shell-session}
-        The answer to the universe and everything is 42.
-        @endcode
-    @endparblock
-@endparblock
-*/
-
-
 // Qt
 #include <QtCore>
 // c++