diff --git a/lib/clif-backend/src/resolver.rs b/lib/clif-backend/src/resolver.rs
index 53b3a789a..dce331b58 100644
--- a/lib/clif-backend/src/resolver.rs
+++ b/lib/clif-backend/src/resolver.rs
@@ -94,7 +94,6 @@ impl FuncResolverBuilder {
         info: &ModuleInfo,
     ) -> CompileResult<(Self, HandlerData)> {
         let num_func_bodies = function_bodies.len();
-        let mut compiled_functions: Vec<(Vec<u8>, RelocSink)> = Vec::with_capacity(num_func_bodies);
         let mut local_relocs = Map::with_capacity(num_func_bodies);
         let mut external_relocs = Map::with_capacity(num_func_bodies);
 
diff --git a/lib/runtime-core/src/cache.rs b/lib/runtime-core/src/cache.rs
index 339b78fcc..1cb804655 100644
--- a/lib/runtime-core/src/cache.rs
+++ b/lib/runtime-core/src/cache.rs
@@ -48,7 +48,7 @@ impl WasmHash {
         let mut state = blake2bp::State::new();
         state.update(wasm);
 
-        let mut hasher = state.finalize();
+        let hasher = state.finalize();
         let generic_array = hasher.as_bytes();
 
         first_part.copy_from_slice(&generic_array[0..32]);
diff --git a/lib/runtime-core/src/error.rs b/lib/runtime-core/src/error.rs
index abc69cc5e..0e2ab6eb7 100644
--- a/lib/runtime-core/src/error.rs
+++ b/lib/runtime-core/src/error.rs
@@ -1,4 +1,3 @@
-use crate::sys::Memory;
 use crate::types::{
     FuncSig, GlobalDescriptor, MemoryDescriptor, MemoryIndex, TableDescriptor, TableIndex, Type,
 };