remove logo (#170)

Author: Barthelemy

doc/CMakeLists.txt

@@ -8,7 +8,6 @@ if (DOXYGEN_FOUND)
   set(DOXYGEN_EXCLUDE "${CMAKE_SOURCE_DIR}/Framework/src/imgui")
   set(DOXYGEN_USE_MDFILE_AS_MAINPAGE "README.md")
   set(DOXYGEN_MARKDOWN_SUPPORT "YES")
-  set(DOXYGEN_PROJECT_LOGO "${CMAKE_SOURCE_DIR}/doc/images/o2_logo.png")
   set(DOXYGEN_GENERATE_TREEVIEW YES)
   set(DOXYGEN_HIDE_UNDOC_RELATIONS NO)
   set(DOXYGEN_HAVE_DOT YES)