Revert "Allow proxies to be compared."

This reverts commit 8264ad53b64162950b9d7d2cde93b5a961ab806b.

Change-Id: Ibbb66617c751dab7e93834892fb97936e5083e97
diff --git a/transport/include/hidl/ConcurrentMap.h b/transport/include/hidl/ConcurrentMap.h
index cd55ad4..18881f1 100644
--- a/transport/include/hidl/ConcurrentMap.h
+++ b/transport/include/hidl/ConcurrentMap.h
@@ -50,19 +50,7 @@
         return mMap.erase(k);
     }
 
-    std::unique_lock<std::mutex> lock() { return std::unique_lock<std::mutex>(mMutex); }
-
-    void setLocked(K&& k, V&& v) { mMap[std::forward<K>(k)] = std::forward<V>(v); }
-
-    const V& getLocked(const K& k, const V& def) const {
-        const_iterator iter = mMap.find(k);
-        if (iter == mMap.end()) {
-            return def;
-        }
-        return iter->second;
-    }
-
-   private:
+private:
     mutable std::mutex mMutex;
     std::map<K, V> mMap;
 };