build: Remove regex crate

Cargo.deps

@@ -1,7 +1,6 @@
 # Dependencies which change based on build flags
 bitflags = "1.2.*"
 clap = { version = "2.33.*", default-features = false }
-regex = { version = "1.3.*", default-features = false, features = ["std", "unicode-case"] }
 
 [dependencies.cairo-rs]
 version = "0.7.*"

Cargo.deps.legacy

@@ -1,7 +1,6 @@
 # Dependencies which change based on build flags
 bitflags = "1.0.*"
 clap = { version = "2.32.*", default-features = false }
-regex = { version = "1.1.*", default-features = false, features = ['use_std'] }
 
 [dependencies.cairo-rs]
 version = "0.5.*"

debian/control

@@ -20,7 +20,6 @@ Build-Depends:
  librust-gtk+v3-22-dev (>= 0.5),
  librust-gtk-sys-dev,
  librust-maplit-1-dev (>= 1.0),
- librust-regex-1-dev (>= 1.1),
  librust-serde-derive-1-dev (>= 1.0),
  librust-serde-yaml-0.8-dev (>= 0.8),
  librust-xkbcommon-0.4+wayland-dev (>= 0.4),

src/lib.rs

@@ -11,7 +11,6 @@ extern crate gtk_sys;
 #[allow(unused_imports)]
 #[macro_use] // only for tests
 extern crate maplit;
-extern crate regex;
 extern crate serde;
 extern crate xkbcommon;