fix(xjx): remove pace controller

[sailxjx]

pace controller is useless in new pipeline

[codecov]

Codecov Report

Merging #400 (021d1d4) into main (f843b19) will increase coverage by 0.14%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #400      +/-   ##
==========================================
+ Coverage   85.71%   85.86%   +0.14%     
==========================================
  Files         525      523       -2     
  Lines       41471    41457      -14     
==========================================
+ Hits        35546    35595      +49     
+ Misses       5925     5862      -63     

Flag	Coverage Δ
unittests	85.86% <ø> (+0.14%)	⬆️

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Impacted Files	Coverage Δ
ding/framework/middleware/functional/__init__.py	100.00% <ø> (ø)
ding/envs/env_manager/tests/test_shm.py	88.46% <0.00%> (-3.54%)	⬇️
ding/worker/learner/comm/flask_fs_learner.py	88.75% <0.00%> (-1.82%)	⬇️
ding/framework/parallel.py	85.34% <0.00%> (-0.91%)	⬇️
ding/envs/env/tests/test_ding_env_wrapper.py	72.03% <0.00%> (-0.78%)	⬇️
ding/entry/serial_entry_onpolicy_ppg.py	28.26% <0.00%> (-0.63%)	⬇️
ding/torch_utils/tests/test_data_helper.py	74.84% <0.00%> (-0.48%)	⬇️
ding/envs/env_manager/envpool_env_manager.py	37.34% <0.00%> (-0.46%)	⬇️
ding/entry/serial_entry_ngu.py	19.17% <0.00%> (-0.27%)	⬇️
ding/entry/serial_entry_gail.py	19.14% <0.00%> (-0.21%)	⬇️
... and 50 more

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