STYLE: Remove redundant casting for same types

[hjmjohnson]

STYLE: Remove redundant casting for same types

Remove explicit type casting operations that involve the same source and
destination types. Covers a range of explicit casting operations,
including static_cast, const_cast, C-style casts, and
reinterpret_cast. Its primary objective is to enhance code
readability and maintainability by eliminating unnecessary
type casting.

Cases found by clang-tidy
https://clang.llvm.org/extra/clang-tidy/checks/readability/redundant-casting.html

PR Checklist

• No API changes were made (or the changes have been approved)

[N-Dekker]

Interesting, thanks Hans! How did you find these cases?

Two minor comments regarding the commit subject line, "ENH: remove redundant casting for same types"

• I think this is not an "ENH". (It does not have new functionality). For improvements of code readability, we typically use the prefix "STYLE".
• We have the convention to start the subject line with a capital letter. Please check https://docs.itk.org/en/latest/contributing/index.html#commit-messages
  So I would suggest: STYLE: Remove redundant casting for same types

Regarding the commit message itself:

Remove explicit type casting operations that involve the same source and
destination types, and subsequently recommend their removal.

What do you mean by "subsequently recommend their removal"?

[hjmjohnson]

Fixed comments.

Cases found by clang-tidy
https://clang.llvm.org/extra/clang-tidy/checks/readability/redundant-casting.html

[N-Dekker]

Thanks Hans 👍