Simplify implementation of arrays

lib/src/util.rs

@@ -1,12 +1,10 @@
 use crate::string::TCString;
-use crate::traits::*;
-use std::ptr::NonNull;
 
 pub(crate) fn err_to_tcstring(e: impl std::string::ToString) -> TCString<'static> {
     TCString::from(e.to_string())
 }
 
-/// A version of Vec::into_raw_parts, which is still unstable.  Returns ptr, len, cap.
+/// An implementation of Vec::into_raw_parts, which is still unstable.  Returns ptr, len, cap.
 pub(crate) fn vec_into_raw_parts<T>(vec: Vec<T>) -> (*mut T, usize, usize) {
     // emulate Vec::into_raw_parts():
     // - disable dropping the Vec with ManuallyDrop
@@ -14,21 +12,3 @@ pub(crate) fn vec_into_raw_parts<T>(vec: Vec<T>) -> (*mut T, usize, usize) {
     let mut vec = std::mem::ManuallyDrop::new(vec);
     return (vec.as_mut_ptr(), vec.len(), vec.capacity());
 }
-
-/// Drop an array of PassByPointer values
-pub(crate) fn drop_pointer_array<T>(mut array: Vec<NonNull<T>>)
-where
-    T: 'static + PassByPointer,
-{
-    // first, drop each of the elements in turn
-    for p in array.drain(..) {
-        // SAFETY:
-        //  - p is not NULL (NonNull)
-        //  - p was generated by Rust (true for all arrays)
-        //  - p was not modified (all arrays are immutable from C)
-        //  - caller will not use this pointer again (promised by caller; p has been drain'd from
-        //    the vector)
-        drop(unsafe { PassByPointer::take_from_arg(p.as_ptr()) });
-    }
-    drop(array);
-}