[librsvg] Revert "Use cargo-features=["edition"] to be able to vendor with the 2018 edition"

[Federico Mena Quintero <federico src gnome org>]

commit d3a8659a48bfc99de668916876358c9567751ea7
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue May 14 11:31:53 2019 -0500

    Revert "Use cargo-features=["edition"] to be able to vendor with the 2018 edition"
    
    I had an old cargo-vendor binary lying around; this option is no longer required.
    
    This reverts commit 6099469d7248aa6b2103c64417f9208049e97ec3.

 Cargo.lock                | 2 ++
 librsvg_crate/Cargo.toml  | 3 ---
 rsvg_internals/Cargo.toml | 2 --
 3 files changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/Cargo.lock b/Cargo.lock
index a33aca00..2501e0ef 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,3 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "aho-corasick"
 version = "0.6.10"
diff --git a/librsvg_crate/Cargo.toml b/librsvg_crate/Cargo.toml
index 5cf5fc1f..294c63fe 100644
--- a/librsvg_crate/Cargo.toml
+++ b/librsvg_crate/Cargo.toml
@@ -1,5 +1,3 @@
-cargo-features = ["edition"]
-
 [package]
 name = "librsvg"
 version = "0.0.1"
@@ -24,4 +22,3 @@ rsvg_internals = { path = "../rsvg_internals" }
 
 [build-dependencies]
 pkg-config = "0.3.14"
-
diff --git a/rsvg_internals/Cargo.toml b/rsvg_internals/Cargo.toml
index 787b2842..bfa2bd16 100644
--- a/rsvg_internals/Cargo.toml
+++ b/rsvg_internals/Cargo.toml
@@ -1,5 +1,3 @@
-cargo-features = ["edition"]
-
 [package]
 name = "rsvg_internals"
 version = "0.0.1"