Ruby

Add miscellaneous Clippy 'corrections' (https://github.com/Shopify/zjit/pull/92)

• Remove redundant statements

• Remove .clone() since A64 implements Copy

• Remove .clone() since InsnId implements Copy

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• Dereference since *const rb_call_data implements Copy

• Remove unnecessary return statement

• Remove unnecessary braces

• Use .is_empty() over length checks

• Remove unnecessary conversion handling

Since i32 can always fit into i64 (the inner type in Opnd::Imm), the conversion is infallibile.

• Use slice notation in lieu of Vec

https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg

• Simplify match statement