cleanup: remove unused imports

src/dc_array.rs

@@ -1,9 +1,6 @@
-use c2rust_bitfields::BitfieldStruct;
 use libc;
 
 use crate::dc_context::*;
-use crate::dc_lot::dc_lot_t;
-use crate::dc_sqlite3::*;
 use crate::dc_tools::*;
 use crate::types::*;
 use crate::x::*;