Remove sandboxing host function interface (#12852)

* Remove sandboxing interface

* Remove unused struct

substrate/client/executor/wasmtime/src/util.rs

@@ -48,24 +48,6 @@ pub fn into_wasmtime_val(value: Value) -> wasmtime::Val {
 	}
 }
 
-/// Read data from a slice of memory into a newly allocated buffer.
-///
-/// Returns an error if the read would go out of the memory bounds.
-pub(crate) fn read_memory(
-	ctx: impl AsContext<Data = StoreData>,
-	source_addr: Pointer<u8>,
-	size: usize,
-) -> Result<Vec<u8>> {
-	let range =
-		checked_range(source_addr.into(), size, ctx.as_context().data().memory().data_size(&ctx))
-			.ok_or_else(|| Error::Other("memory read is out of bounds".into()))?;
-
-	let mut buffer = vec![0; range.len()];
-	read_memory_into(ctx, source_addr, &mut buffer)?;
-
-	Ok(buffer)
-}
-
 /// Read data from the instance memory into a slice.
 ///
 /// Returns an error if the read would go out of the memory bounds.