message: remove unused DEFAULT_TARGET static
diff: @@ -26,7 +26,6 @@ static TARGETS: &[&str] = &[
  "x86_64-pc-windows-msvc",
  "x86_64-unknown-linux-gnu",
  ];
  -static DEFAULT_TARGET: &str = "x86_64-unknown-linux-gnu";
  static ESSENTIAL_FILES_VERSIONED: &[&str] = &[
  "brush.svg",
  