Remove unused session param

Author: bahusoid

src/NHibernate.DomainModel/CustomPersister.cs

@@ -399,7 +399,7 @@ public object CreateProxy(object id, ISessionImplementor session)
 			throw new NotSupportedException("no proxy for this class");
 		}
 
-		public bool? IsTransient(object obj, ISessionImplementor session)
+		public bool? IsTransient(object obj)
 		{
 			return ((Custom) obj).Id == null;
 		}

src/NHibernate/Persister/Entity/AbstractEntityPersister.cs

@@ -4193,7 +4193,7 @@ public virtual void AfterReassociate(object entity, ISessionImplementor session)
 			}
 		}
 
-		public virtual bool? IsTransient(object entity, ISessionImplementor session)
+		public virtual bool? IsTransient(object entity)
 		{
 			object id;
 			if (CanExtractIdOutOfEntity)

src/NHibernate/Persister/Entity/IEntityPersister.cs

@@ -458,7 +458,7 @@ void Update(
 		object CreateProxy(object id, ISessionImplementor session);
 
 		/// <summary> Is this a new transient instance?</summary>
-		bool? IsTransient(object obj, ISessionImplementor session);
+		bool? IsTransient(object obj);
 
 		/// <summary> Return the values of the insertable properties of the object (including backrefs)</summary>
 		object[] GetPropertyValuesToInsert(object obj, IDictionary mergeMap, ISessionImplementor session);