ScopInfo: Fix typos

Contributed-by:  Michael Kruse  <MichaelKruse@meinersbur.de>
ScopInfo: Do not include "isl/int.h" any more

We already removed all uses of isl_int in ScopInfo.

Contributed-by:  Michael Kruse  <MichaelKruse@meinersbur.de>
Use LLVM_DELETED_FUNCTION instead of a comment

Contributed-by:  Michael Kruse  <MichaelKruse@meinersbur.de>
clang-format