* rm op_function_generator

* rm op_func_generator.h

* rm op_function

* modify cmake

* rm op_function.h

* rm check for op_function_generator.cc

* reset imperative

* rm python part

* fix imperative

* lint

* lint

* modify legacy_c

* review

* modify

* modify legacy

* rm gen op_functions code

* reset framework

* rm core.ops for test

* core.ops->core.eager.ops.legacy

* not raiseError for xpu

* approve_for_setup,test=test=document_fix

* test

* fix get_single_test_cov.py bug

* debug

* move fc from fluid to paddle2.0

* fix unit test

* fix some examples

* fix some examples

* remove fluid.save_dygraph and fluid.load_dygraph use paddle.save and paddle.load instead

* move Sequential to paddle.nn

* modify convert_call_func.py Sequential reference

* remove related unitests

* remove fluid.dynamic.Sequntial

* test remove conver_call_func

* fix conflicts

* fix typro

* fix unitests

* fix sample_code

* fix unitest

* fix __init__

* [CodeStyle][py2] test dockerfile

* remove some deps for pip2.7

* clean python2

* remove pip upgrade

* use tar extract setuptools package

* downgrade setuptools

* speedup getFNDAFile

* add fnda_base for c++ ut cc file

* fix bug

* fix bug

* fix bug

* fix bug

* Add CheckPRTemplate.py;test=document_fix;test=prtemplate

* Add CheckPRTemplate.py;test=document_fix;test=prtemplate

* Add CheckPRTemplate.py;test=document_fix;test=prtemplate

* fix matmul double and triple grad

* remove some comment

* add matmul_double_grad unit test

* fix matmul triple grad

* fix dot triple grad and add unit test

* modify codestyle

* fix dot_grad

* refactor dot triple grad

* disable some unit test

* fix unit test

* fix unit test in double grad

* rm paddle.fluid.contrib.layers.BasicLSTMUnit basic_lstm BasicGRUUnit basic_gru

* rm dependency in __init__.py

* add index sample fp16 support

* remove fluid APIs in distributed_strategy.py and role_maker.py

* Revert "remove fluid APIs in distributed_strategy.py and role_maker.py"

This reverts commit 223bbee990d3bf69e252fc3c0f19e3873550a264.

* remove fluid APIs in distributed_strategy.py and role_maker.py

* remove index sample op changes

* remove fluid APIs under fleet.base

* remove fluid APIs under fleet.layers.mpu

* remove fluid APIs under fleet.meta_optimizers

* fix fluid error

* fix util_factory.py

* reset fluid.io.load_inference_model API

* remove dygraph.parallel.prepare_context

* remove fluid.dygraph.StaticModelRunner API

* remove split_lod_tensor merge_lod_tensor

* remove unittests

* delete FLAGS_enable_eager_mode

* print prec_delta

* modify after zhangbo reviewed

* print prec delta

* remove lstm api

* remove gru_unit api

* remove lstm in all

* remove beam-search

* remove beam_search slot

* remove lstm test code

* remove fluid.layers.nn api

* update gru-unit

* revert gru_unit white list

* remove density_prior_box

* remove anchor_generator

* remove roi_perspective_transform

* remove generate_proposal_labels

* remove generate_mask_labels

* remove generate_proposals

* remove box_clip

* remove retinanet_detection_output

* remove multiclass_nms

* remove locality_aware_nms

* remove matrix_nms

* remove distribute_fpn_proposals

* remove box_decoder_and_assign

* remove collect_fpn_proposals

* remove 2 trt files

* move prior_box to static/nn/common.py

* move multi_box_head to static/nn/common.py

* fix for CI/CE

* remove retinanet_detection_output

* restore compile_vs_runtime_white_list.py

* restore test_retinanet_detection_output to white list

* replace nn.flatten by paddle.flatten, and fix doc for retinanet_target_assign

* add enable_static in demo and fix bug

* remove roi_perspective_transform in test_layers

* remove multi_box_head

* change self.multiclass_nms to _legacy_C_ops.multiclass_nms

* empty commit

* empty commit

* check code style

* fix prior_box

* fix CI

* remove redundant prior_box in detection.py

* fix docs

* remove detection

* fix prior_box en doc

* delete prior_box in common

* remote proir_box from __init__.py

* Deleted mkldnn_inplace_pass code

* Fixed error with cmake

* Resolve conflicts

* [tools] remove deprecated api , fix macOS get version error

* [tools] Rename the value that returns null

* [tools] add gcc, clang, cmak, libc version

* [tools] fix cudnn read error

* [tools] add gpu devices list, drive based

* [issue] update 3_build-installation-issue.yml

* [tools] fix get gpu list AttributeError

* remove linear_chain_crf and crf_decoding

* test approve ,test=document_fix

* test approve ,test=document_fix

* test approve ,test=document_fix

* Merge branch 'reduce_sum' of https://github.com/GhostScreaming/Paddle into mine_fluid_clean_common.

* Fix some bugs.

* Clean APIs in python/paddle/fluid/layers/control_flow.py

* Polish code style.

* Change API.

* Fix some bugs.

* Fix some bugs.

* Replace mutable_data with DeviceContext.Alloc in phi kernels

* Fix CI errors

* Fix CI errors

* Fix CI errors, test=kunlun

* Fix CI errors, test=kunlun

* Handle rnn_functor

* Update approvals

* check standard api

* test approve,test=document_fix

* test approve

* perfect approve msg

* test_approve

* test_approve

* test_approve

* approve test

* test approve,test=document_fix

* test approve,test=document_fix

* fix bugs,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* test approve,test=document_fix

* isort all files

* revert conflicting files

* revert conflicting files

* revert conflicting files

* Remove API: lod_append
	remove lod_append which is not used in Paddle 2.0

* remove lod_append test file

* Optimize the log of broadcast and decrease the log level.

* Remove the redundant brackets.

* Change op benchmark ci to test the tests module.

* Remove the observe of elementwise and reduce_ops sub-directory.

* add ci check for code-gen script

* update