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

This reverts commit f8b7128dca.

backend/core/Cargo.toml

@@ -1,29 +0,0 @@
-[package]
-name = "telemetry"
-version = "0.3.0"
-authors = ["Parity Technologies Ltd. <admin@parity.io>"]
-edition = "2018"
-license = "GPL-3.0"
-
-[dependencies]
-actix = "0.11.1"
-actix-web = { version = "4.0.0-beta.4", default-features = false }
-actix-web-actors = "4.0.0-beta.3"
-actix-http = "3.0.0-beta.4"
-bincode = "1.3.3"
-bytes = "1.0.1"
-chrono = { version = "0.4", features = ["serde"] }
-fnv = "1.0.7"
-hex = "0.4.3"
-serde = { version = "1.0", features = ["derive"] }
-serde_json = { version = "1.0", features = ["raw_value"] }
-thiserror = "1.0.24"
-primitive-types = { version = "0.9.0", features = ["serde"] }
-log = "0.4"
-simple_logger = "1.11.0"
-num-traits = "0.2"
-parking_lot = "0.11"
-reqwest = { version = "0.11.1", features = ["blocking", "json"] }
-rustc-hash = "1.1.0"
-clap = "3.0.0-beta.2"
-ctor = "0.1.20"