remove version 1 check

Author: nesrak1

AddressablesTools/Catalog/ContentCatalogData.cs

@@ -358,11 +358,6 @@ internal void Write(ContentCatalogDataJson data)
 
         internal void Write(CatalogBinaryWriter writer, SerializedTypeAsmContainer staCont)
         {
-            if (Version == 1)
-            {
-                throw new NotSupportedException("Only version 2 catalogs are supported for writing so far.");
-            }
-
             writer.Version = Version;
 
             ContentCatalogDataBinaryHeader header = new ContentCatalogDataBinaryHeader();