Remove unused ProjectNameKeyDeserializer class

In If9ccb759c the usage of ProjectNameKeyDeserializer was replaced with
ProjectNameKeyAdapter from gerrit core, but the old class wasn't
removed.

Change-Id: I07a50383a5353b60d33a65251172361a56b09463

src/main/java/com/gerritforge/gerrit/eventbroker/EventGsonProvider.java

diff --git a/src/main/java/com/gerritforge/gerrit/eventbroker/EventGsonProvider.java b/src/main/java/com/gerritforge/gerrit/eventbroker/EventGsonProvider.java
index bf55621..e87419c 100644
--- a/src/main/java/com/gerritforge/gerrit/eventbroker/EventGsonProvider.java
+++ b/src/main/java/com/gerritforge/gerrit/eventbroker/EventGsonProvider.java
@@ -26,11 +26,8 @@
 import com.google.gerrit.server.events.SupplierSerializer;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
-import com.google.gson.JsonDeserializationContext;
-import com.google.gson.JsonDeserializer;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonParseException;
-import com.google.gson.JsonPrimitive;
 import com.google.gson.JsonSerializationContext;
 import com.google.gson.JsonSerializer;
 import com.google.inject.Provider;
@@ -53,24 +50,6 @@
     }
   }
 
-  public class ProjectNameKeyDeserializer implements JsonDeserializer<Project.NameKey> {
-
-    @Override
-    public Project.NameKey deserialize(
-        JsonElement json, Type type, JsonDeserializationContext context) throws JsonParseException {
-      if (!json.isJsonPrimitive()) {
-        throw new JsonParseException("Not a primitive type");
-      }
-
-      JsonPrimitive jsonPrimitive = (JsonPrimitive) json;
-      if (!jsonPrimitive.isString()) {
-        throw new JsonParseException("Not a string");
-      }
-
-      return Project.nameKey(jsonPrimitive.getAsString());
-    }
-  }
-
   @Override
   public Gson get() {
     return new GsonBuilder()