Cleanup sandbox/ in advance of re-enabling some MSVC warnings.

sandbox/win/src/service_resolver_64.cc

Index: sandbox/win/src/service_resolver_64.cc
diff --git a/sandbox/win/src/service_resolver_64.cc b/sandbox/win/src/service_resolver_64.cc
index 03795f7c9d0ce5e82c85e1dd4d41113e1b6faf49..984cb384e2773ea8593e015ac628afb7247c2557 100644
--- a/sandbox/win/src/service_resolver_64.cc
+++ b/sandbox/win/src/service_resolver_64.cc
@@ -168,11 +168,6 @@ bool ServiceResolverThunk::IsFunctionAService(void* local_thunk) const {
 
 NTSTATUS ServiceResolverThunk::PerformPatch(void* local_thunk,
                                             void* remote_thunk) {
-  ServiceFullThunk* full_local_thunk =
-      reinterpret_cast<ServiceFullThunk*>(local_thunk);
-  ServiceFullThunk* full_remote_thunk =
-      reinterpret_cast<ServiceFullThunk*>(remote_thunk);
-
   // Patch the original code.
   ServiceEntry local_service;
   DCHECK_NT(GetInternalThunkSize() >= sizeof(local_service));