CMake: beautification, fix some comments

Signed-off-by: David Wagner <david.wagner@intel.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 283f452..b12c5f6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@
 
 project(parameter-framework)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -Wall -Wextra") # -Wno-unused-parameter
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -Wall -Wextra")
 
 add_subdirectory(xmlserializer)
 add_subdirectory(parameter)