remove trailing code

Author: SkymanOne

crates/ink/ir/src/ir/event/mod.rs

@@ -29,10 +29,7 @@ use crate::{
     utils::extract_cfg_attributes,
 };
 
-pub use signature_topic::{
-    SignatureTopic,
-    SignatureTopicArg,
-};
+pub use signature_topic::SignatureTopicArg;
 
 /// A checked ink! event with its configuration.
 #[derive(Debug, PartialEq, Eq)]

crates/ink/ir/src/ir/event/signature_topic.rs

@@ -13,18 +13,9 @@
 // limitations under the License.
 
 use impl_serde::serialize as serde_hex;
-use proc_macro2::{
-    Span,
-    TokenStream as TokenStream2,
-};
-use quote::ToTokens;
 use syn::spanned::Spanned;
 
-use crate::{
-    ast,
-    error::ExtError,
-    utils::extract_cfg_attributes,
-};
+use crate::ast;
 
 /// The signature topic argument of an event variant.
 ///
@@ -132,57 +123,3 @@ impl TryFrom<&syn::MetaNameValue> for SignatureTopicArg {
         }
     }
 }
-
-/// The signature topic argument of an event variant.
-///
-/// Used as part of `ink::signature_topic` macro.
-///
-/// Calculated with `blake2b("Event(field1_type,field2_type)")`.
-#[derive(Debug, PartialEq, Eq)]
-pub struct SignatureTopic {
-    item: syn::ItemStruct,
-    arg: Option<SignatureTopicArg>,
-}
-
-impl SignatureTopic {
-    pub fn new(config: TokenStream2, item: TokenStream2) -> Result<Self, syn::Error> {
-        let item = syn::parse2::<syn::ItemStruct>(item.clone()).map_err(|err| {
-            err.into_combine(format_err_spanned!(
-                item,
-                "event definition must be a `struct`",
-            ))
-        })?;
-        let parsed_config = syn::parse2::<crate::ast::AttributeArgs>(config)?;
-        let arg = Option::<SignatureTopicArg>::try_from(parsed_config)?;
-
-        for attr in &item.attrs {
-            if attr
-                .path()
-                .to_token_stream()
-                .to_string()
-                .contains("signature_topic")
-            {
-                return Err(format_err_spanned!(
-                    attr,
-                    "only one `ink::signature_topic` is allowed",
-                ));
-            }
-        }
-        Ok(Self { item, arg })
-    }
-
-    /// Returns the event definition .
-    pub fn item(&self) -> &syn::ItemStruct {
-        &self.item
-    }
-
-    /// Return a signature topic, if required.
-    pub fn signature_topic(&self) -> Option<[u8; 32]> {
-        self.arg.map(|a| a.signature_topic())
-    }
-
-    /// Returns a list of `cfg` attributes if any.
-    pub fn get_cfg_attrs(&self, span: Span) -> Vec<TokenStream2> {
-        extract_cfg_attributes(&self.item.attrs, span)
-    }
-}

crates/ink/ir/src/ir/mod.rs

@@ -72,7 +72,6 @@ pub use self::{
     contract::Contract,
     event::{
         Event,
-        SignatureTopic,
         SignatureTopicArg,
     },
     ink_test::InkTest,

crates/ink/ir/src/lib.rs

@@ -77,7 +77,6 @@ pub use self::{
         Receiver,
         Selector,
         SelectorMacro,
-        SignatureTopic,
         SignatureTopicArg,
         Storage,
         StorageItem,

crates/ink/macro/src/lib.rs

@@ -1344,8 +1344,7 @@ synstructure::decl_derive!(
     [Event, attributes(ink)] =>
     /// Derives an implementation of the [`ink::Event`] trait for the given `struct`.
     ///
-    /// **Note** [`ink::Event`] requires [`scale::Encode`] implementation,
-    /// it is up to the user to provide that: usually via the derive and `#[ink::signature_topic]` macros.
+    /// **Note** [`ink::Event`] requires [`scale::Encode`] implementation.
     ///
     /// Usually this is used in conjunction with the [`EventMetadata`] derive.
     ///