Remove outdated C++03 instructions
Remove outdated C++03 instructions

Buddy: Vimmy

eegeo/eegeo-example-app,wrld3d/wrld-example-app,eegeo/eegeo-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,eegeo/eegeo-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,eegeo/eegeo-example-app,wrld3d/wrld-example-app,eegeo/eegeo-example-app,eegeo/eegeo-example-app,eegeo/eegeo-example-app,wrld3d/wrld-example-app