fix extra changelog stuff

CHANGELOG.md

@@ -10,18 +10,11 @@ and this project aspires to adhere to [Semantic Versioning](https://semver.org/s
 
 #### General
 - Added  `conduit::utils::info_handler()`, `conduit::utils::warning_handler()`, and `conduit::utils::error_handler()`  methods, which provide access to the currently registered info, warning, and error handlers.
-- Added DataType::index_t method. Creates a DataType instance that describes an `index_t`, which is an alias to either `int32`, or `int 64` controlled by the `CONDUIT_INDEX_32` compile time option.
-- Added several more methods to Python DataType interface
 
 #### Relay
 - Added Relay HDF5 support for reading and writing to an HDF5 dataset with offset.
 - Added `conduit::relay::io::hdf5::read_info` which allows you to obtain metadata from an HDF5 file.
 
-### Fixed
-
-#### General
-- Fixed missing implementation of DataType::is_index_t 
-
 
 ## [0.7.1] - Released 2021-02-11