Remove unused dependency `bigint` (#8505)

* remove unused dependency bigint in

* remove bigint in rpc_cli

Cargo.lock

@@ -102,16 +102,6 @@ dependencies = [
  "safemem 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "bigint"
-version = "4.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "crunchy 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "bincode"
 version = "0.8.0"
@@ -1634,7 +1624,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "memorydb"
 version = "0.1.1"
 dependencies = [
- "bigint 4.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "elastic-array 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethereum-types 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "hashdb 0.1.1",
@@ -2806,7 +2795,6 @@ dependencies = [
 name = "rpc-cli"
 version = "1.4.0"
 dependencies = [
- "bigint 4.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-rpc 1.12.0",
  "parity-rpc-client 1.4.0",
@@ -3783,7 +3771,6 @@ dependencies = [
 "checksum base32 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1b9605ba46d61df0410d8ac686b0007add8172eba90e8e909c347856fe794d8c"
 "checksum base64 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "96434f987501f0ed4eb336a411e0631ecd1afa11574fe148587adc4ff96143c9"
 "checksum base64 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "229d032f1a99302697f10b27167ae6d03d49d032e6a8e2550e8d3fc13356d2b4"
-"checksum bigint 4.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5442186ef6560f30f1ee4b9c1e4c87a35a6879d3644550cc248ec2b955eb5fcd"
 "checksum bincode 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e103c8b299b28a9c6990458b7013dc4a8356a9b854c51b9883241f5866fac36e"
 "checksum bit-set 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d9bf6104718e80d7b26a68fdbacff3481cfc05df670821affc7e9cbc1884400c"
 "checksum bit-vec 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "02b4ff8b16e6076c3e14220b39fbc1fabb6737522281a388998046859400895f"

rpc_cli/Cargo.toml

@@ -9,6 +9,5 @@ version = "1.4.0"
 [dependencies]
 futures = "0.1"
 rpassword = "1.0"
-bigint = "4.0"
 parity-rpc = { path = "../rpc" }
 parity-rpc-client = { path = "../rpc_client" }

util/memorydb/Cargo.toml

@@ -6,7 +6,6 @@ description = "in-memory implementation of hashdb"
 license = "GPL-3.0"
 
 [dependencies]
-bigint = "4.0"
 elastic-array = "0.10"
 heapsize = "0.4"
 ethereum-types = "0.3"