fix remove_rows

[genieCS]

bootstrap.js:5  Error importing `index.js`: RuntimeError: unreachable
    at __rust_start_panic (8548a4dfbf778c01a17b.module.wasm:0x141f87)
    at rust_panic (8548a4dfbf778c01a17b.module.wasm:0x140305)
    at std::panicking::rust_panic_with_hook::hc53aea0352e77326 (8548a4dfbf778c01a17b.module.wasm:0xeffe9)
    at std::panicking::begin_panic_handler::{{closure}}::ha183a8279614f03a (8548a4dfbf778c01a17b.module.wasm:0x1068a2)
    at std::sys_common::backtrace::__rust_end_short_backtrace::hc33870f333461503 (8548a4dfbf778c01a17b.module.wasm:0x13f0c5)
    at rust_begin_unwind (8548a4dfbf778c01a17b.module.wasm:0x12a2b8)
    at core::panicking::panic_fmt::hf4a9df75710ece83 (8548a4dfbf778c01a17b.module.wasm:0x13ad82)
    at core::panicking::panic_bounds_check::h8c0b59521a475ac0 (8548a4dfbf778c01a17b.module.wasm:0x11460f)
    at <usize as core::slice::index::SliceIndex<[T]>>::index_mut::h8ae60999fdd47745 (8548a4dfbf778c01a17b.module.wasm:0x110749)
    at <alloc::vec::Vec<T,A> as core::ops::index::IndexMut<I>>::index_mut::hd0121d327c0a7ccd (8548a4dfbf778c01a17b.module.wasm:0x11b3aa)