Remove serde-big-array for M = 6

Cargo.toml

@@ -16,4 +16,3 @@ ordered-float = "2.0"
 rand = { version = "0.8", features = ["small_rng"] }
 rayon = "1.5"
 serde = { version = "1.0.118", features = ["derive"], optional = true }
-serde-big-array = { version = "0.3.1", optional = true }

src/lib.rs

@@ -12,8 +12,6 @@ use rand::{Rng, SeedableRng};
 use rayon::iter::{IntoParallelRefMutIterator, ParallelIterator};
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
-#[cfg(feature = "serde")]
-use serde_big_array::big_array;
 
 /// Parameters for building the `Hnsw`
 pub struct Builder {
@@ -704,13 +702,9 @@ struct ZeroNode {
     /// The nearest neighbors on this layer
     ///
     /// This is always kept in sorted order (near to far).
-    #[cfg_attr(feature = "serde", serde(with = "BigArray"))]
     nearest: [PointId; M * 2],
 }
 
-#[cfg(feature = "serde-big-array")]
-big_array! { BigArray; }
-
 impl Default for ZeroNode {
     fn default() -> ZeroNode {
         ZeroNode {