Revert "Preparing backend to receive data from shards (#337)"

This reverts commit f8b7128dca.

backend/core/src/util.rs

@@ -1,31 +0,0 @@
-mod dense_map;
-mod hash;
-mod location;
-mod mean_list;
-mod num_stats;
-
-pub use dense_map::DenseMap;
-pub use hash::Hash;
-pub use location::{LocateRequest, Locator, LocatorFactory};
-pub use mean_list::MeanList;
-pub use num_stats::NumStats;
-
-pub fn fnv<D: AsRef<[u8]>>(data: D) -> u64 {
-    use fnv::FnvHasher;
-    use std::hash::Hasher;
-
-    let mut hasher = FnvHasher::default();
-
-    hasher.write(data.as_ref());
-    hasher.finish()
-}
-
-/// Returns current unix time in ms (compatible with JS Date.now())
-pub fn now() -> u64 {
-    use std::time::SystemTime;
-
-    SystemTime::now()
-        .duration_since(SystemTime::UNIX_EPOCH)
-        .expect("System time must be configured to be post Unix Epoch start; qed")
-        .as_millis() as u64
-}