Reexport paste from sp-runtime in bp-runtime to aviod including paste dependency everywhere (#1556)

* Reexport paste from `sp-runtime` in `bp-runtime` to aviod including `paste` dependency everywhere

* Add import `bp_runtime` to macro calls: decl_bridge_finality_runtime_apis/decl_bridge_messages_runtime_apis

bridges/primitives/chain-polkadot/Cargo.toml

@@ -8,7 +8,6 @@ license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
 
 [dependencies]
 smallvec = "1.7"
-paste = "1.0"
 
 # Bridge Dependencies
 

bridges/primitives/chain-polkadot/src/lib.rs

@@ -29,9 +29,7 @@ use sp_std::prelude::*;
 use sp_version::RuntimeVersion;
 
 pub use bp_polkadot_core::*;
-use bp_runtime::{
-	decl_bridge_finality_runtime_apis, decl_bridge_messages_runtime_apis, decl_bridge_runtime_apis,
-};
+use bp_runtime::decl_bridge_runtime_apis;
 
 /// Polkadot Chain
 pub type Polkadot = PolkadotLike;