remove mem opt in PaddleNLP

This reverts commit 5e41760f.

* update .run_ce.sh

* chmod +x .run_ce.sh

* add elmo ce

* Refine the print and add timing for each step and epoch.

* Enable the profile.

Fix the data file empty check.
Fix the utf8 file encoding.
Refine the README.

remove knowledge-driven-dialogue from readme

* fix args bug and remove test code

* remove print code

* update .run_ce.sh

* chmod +x .run_ce.sh

* fix pred in simnet

* add init checkpoint in train and fix file open bug in window10

* Update README.md

* fix file open bug in test

* Update transformer to be unified

* To support CE when unifing Transformer

* fix pred in simnet

* add init checkpoint in train and fix file open bug in window10

* Update README.md

* dgu_and_ade

* fix_comment

* move_dam_to_research_and_fix_bug

* move_dam_to_research_and_fix_bug

Fix typos in DAM readme