Update libc, remove redundant Cargo.lock

Cargo.lock

@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "libc"
-version = "0.2.70"
+version = "0.2.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3baa92041a6fec78c687fa0cc2b3fae8884f743d672cf551bed1d6dac6988d0f"
+checksum = "9457b06509d27052635f90d6466700c65095fdf75409b3fbdd903e988b886f49"
 
 [[package]]
 name = "neco"

safe_libc/Cargo.lock

@@ -1,14 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "libc"
-version = "0.2.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99e85c08494b21a9054e7fe1374a732aeadaff3980b6990b94bfd3a70f690005"
-
-[[package]]
-name = "safe_libc"
-version = "0.1.0"
-dependencies = [
- "libc",
-]

safe_libc/Cargo.toml

@@ -7,4 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-libc = { version = "0.2.70", default-features = false }
+libc = { version = "0.2.71", default-features = false }