### What problem does this PR solve?
This patch drop useless fastext which is seems useless in the code base
and its very kind of hard install
should close#4498
### Type of change
- [x] Refactoring
Signed-off-by: yihong0618 <zouzou0208@gmail.com>
### What problem does this PR solve?
Run keyword_extraction, question_proposal, content_tagging in threads
### Type of change
- [x] Performance Improvement
### What problem does this PR solve?
Replaced pypi.tuna.tsinghua.edu.cn with mirrors.aliyun.com/pypi.
I notice aliyun.com sometimes is much faster than tsinghua.edu.
### Type of change
- [x] Refactoring
### What problem does this PR solve?
Fixed GPU detection on CPU only environment. Close#4692
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Removed onnxruntime. It conflicts with the onnxruntime-gpu.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Bump infinity to v0.6.0-dev2. Close#4477
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
