Remove unused error variable

Author: Destiner

src/services/evm.ts

@@ -27,7 +27,7 @@ class Service {
         hash,
       });
       return transaction || null;
-    } catch (e) {
+    } catch {
       return null;
     }
   }
@@ -40,7 +40,7 @@ class Service {
         hash,
       });
       return receipt || null;
-    } catch (e) {
+    } catch {
       return null;
     }
   }