fix Cargo.lock

This reverts commit 2eaa99e82d.

These functions are not necessary.  Remove their usages which are only used in tests and frankenstein code.

Cargo.lock

@@ -25,6 +25,7 @@ name = "card_game"
 version = "0.4.0"
 dependencies = [
  "arrayvec",
+ "serde",
 ]
 
 [[package]]
@@ -130,6 +131,7 @@ version = "0.3.0"
 dependencies = [
  "card_game",
  "rand",
+ "serde",
 ]
 
 [[package]]
@@ -238,6 +240,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
 dependencies = [
  "serde_core",
+ "serde_derive",
 ]
 
 [[package]]

card_game/src/lib.rs

@@ -72,10 +72,6 @@ impl Suit {
 	pub const fn is_red(self) -> bool {
 		self as u8 & 0b01 != 0
 	}
-	/// Is the suit black.
-	pub const fn is_black(self) -> bool {
-		!self.is_red()
-	}
 	/// Suit value is 2 bits, is_red is the low bit.
 	pub const fn suit_high_bit(self) -> bool {
 		self as u8 & 0b10 != 0
@@ -134,10 +130,6 @@ impl Rank {
 			_ => return None,
 		})
 	}
-	/// Numeric value: Ace = 1, King = 13.
-	pub const fn value(self) -> u8 {
-		self as u8
-	}
 	pub const fn checked_add(self, offset: u8) -> Option<Rank> {
 		match (self as u8).checked_add(offset) {
 			Some(rank) => Self::new(rank),