debugging: slides: remove duplicate mention to flamegraphs repository

Signed-off-by: Alexis Lothoré <[email protected]>

Author: Tropicao

slides/debugging-system-wide-profiling/debugging-system-wide-profiling.tex

@@ -439,10 +439,8 @@ \subsection{perf}
         \end{minted}
       \end{block}
       \begin{itemize}
-        \item \code{stackcollapse-perf.pl} is part of the
-          \href{https://github.com/brendangregg/FlameGraph}{Flamegraph
-          repository}
-        \item Other data sources are supported
+        \item Other data sources are supported (eg: DTrace, SystemTap,
+          Intel VTune, gdb...)
       \end{itemize}
     \item Generate the Flamegraph:
       \begin{block}{}