Update CHANGELOG.

static/plugin_event/CHANGELOG

 --------------------------------- CHANGELOG ----------------------------------
 
 HEAD
-  - Major release with is non backward compatible.
+  - Major release which is non backward compatible.
     It introduces new mechanisms for the reporting based on pandas.DataFrame.
   - Required plugin_dbui 0.9.8 or higher.
-  - Add two tables Lists2 and Metrics2D2.  Keep tables Graphs, Lists,
-    Metrics1D, Metrics2D to ease the migration toward the new paradign,
-    but they are obsolete and should be removed in the next version.
+  - Add two tables Lists2 and Metrics2D2.
+  - Remove the tables Graphs, Lists, Metrics1D, Metrics2D.
   - Remove the modules selector and report_objects.
   - Add the modules dataframes, and report_tools.
   - Improve the UI for the filtering of the history table, as well as
     for the selector used by reports.
   - Introduce the JavaScript widgets Summary and Graph.
-  - Add the scripts migrate-list-070.py and migrate-metric2d-070.py to ease
-    the migration for existing reports.
   - Update the documentation.
 
 0.6.4 (Jan 2017)