Fix cpplint readability/braces issues

Change-Id: I56b88956510077b0e13aad4caee8898313fab55b
diff --git a/compiler/dex/backend.h b/compiler/dex/backend.h
index acfec42..01959b7 100644
--- a/compiler/dex/backend.h
+++ b/compiler/dex/backend.h
@@ -24,12 +24,12 @@
 
 class Backend {
   public:
-    virtual ~Backend() {};
+    virtual ~Backend() {}
     virtual void Materialize() = 0;
     virtual CompiledMethod* GetCompiledMethod() = 0;
 
   protected:
-    explicit Backend(ArenaAllocator* arena) : arena_(arena) {};
+    explicit Backend(ArenaAllocator* arena) : arena_(arena) {}
     ArenaAllocator* const arena_;
 };  // Class Backend