Do not traumatize users with exceptions

[keryell]

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First code has to be simple. Remove all the error handlers and other try/catch from SC22 Lesson 1. I wish I could have made a PR but it looks like the source-code of the is actually made of binary PNG... :-( Also fix the includes to

#include <sycl/sycl.hpp>

It would be more coherent to have {} in accessor constructors too.