Fix dogfood test failures.

Author: Centril

clippy_lints/src/identity_conversion.rs

@@ -50,8 +50,6 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for IdentityConversion {
                 };
                 if let ExprKind::Call(_, ref args) = e.node {
                     self.try_desugar_arm.push(args[0].hir_id);
-                } else {
-                    return;
                 }
             },
 

clippy_lints/src/utils/usage.rs

@@ -37,7 +37,7 @@ pub fn is_potentially_mutated<'a, 'tcx>(variable: &'tcx Path, expr: &'tcx Expr,
     if let Res::Local(id) = variable.res {
         mutated_variables(expr, cx).map_or(true, |mutated| mutated.contains(&id))
     } else {
-        return true;
+        true
     }
 }