key.rs: remove some deprecated methods

These have been deprecated since 2ad6555 which
made it into the 9.x release. Fine to delete them.

Author: apoelstra

src/descriptor/key.rs

@@ -810,10 +810,6 @@ impl DescriptorPublicKey {
         }
     }
 
-    /// Whether or not the key has a wildcard
-    #[deprecated(note = "use has_wildcard instead")]
-    pub fn is_deriveable(&self) -> bool { self.has_wildcard() }
-
     /// Whether or not the key has a wildcard
     pub fn has_wildcard(&self) -> bool {
         match *self {
@@ -840,12 +836,6 @@ impl DescriptorPublicKey {
         false
     }
 
-    #[deprecated(note = "use at_derivation_index instead")]
-    /// Deprecated name for [`Self::at_derivation_index`].
-    pub fn derive(self, index: u32) -> Result<DefiniteDescriptorKey, ConversionError> {
-        self.at_derivation_index(index)
-    }
-
     /// Replaces any wildcard (i.e. `/*`) in the key with a particular derivation index, turning it into a
     /// *definite* key (i.e. one where all the derivation paths are set).
     ///

src/descriptor/mod.rs

@@ -648,10 +648,6 @@ impl<Pk: MiniscriptKey> ForEachKey<Pk> for Descriptor<Pk> {
 }
 
 impl Descriptor<DescriptorPublicKey> {
-    /// Whether or not the descriptor has any wildcards
-    #[deprecated(note = "use has_wildcards instead")]
-    pub fn is_deriveable(&self) -> bool { self.has_wildcard() }
-
     /// Whether or not the descriptor has any wildcards i.e. `/*`.
     pub fn has_wildcard(&self) -> bool { self.for_any_key(|key| key.has_wildcard()) }
 
@@ -684,12 +680,6 @@ impl Descriptor<DescriptorPublicKey> {
             .map_err(|e| e.expect_translator_err("No Context errors while translating"))
     }
 
-    #[deprecated(note = "use at_derivation_index instead")]
-    /// Deprecated name for [`Self::at_derivation_index`].
-    pub fn derive(&self, index: u32) -> Result<Descriptor<DefiniteDescriptorKey>, ConversionError> {
-        self.at_derivation_index(index)
-    }
-
     /// Convert all the public keys in the descriptor to [`bitcoin::PublicKey`] by deriving them or
     /// otherwise converting them. All [`bitcoin::secp256k1::XOnlyPublicKey`]s are converted to by adding a
     /// default(0x02) y-coordinate.