Remove memory_pool_limit in trt config (#7647)

Fixes Project-MONAI/model-zoo#568.

### Description

Remove memory_pool_limit in trt config

### Types of changes
<!--- Put an `x` in all the boxes that apply, and remove the not
applicable items -->
- [x] Non-breaking change (fix or new feature that would not break
existing functionality).
- [ ] Breaking change (fix or new feature that would cause existing
functionality to change).
- [ ] New tests added to cover the changes.
- [ ] Integration tests passed locally by running `./runtests.sh -f -u
--net --coverage`.
- [ ] Quick tests passed locally by running `./runtests.sh --quick
--unittests --disttests`.
- [ ] In-line docstrings updated.
- [ ] Documentation updated, tested `make html` command in the `docs/`
folder.

Signed-off-by: YunLiu <[email protected]>

monai/networks/utils.py

@@ -840,7 +840,6 @@ def _onnx_trt_compile(
 
     # set up the conversion configuration
     config = builder.create_builder_config()
-    config.set_memory_pool_limit(trt.MemoryPoolType.WORKSPACE, 1 << 31)
     config.add_optimization_profile(profile)
     if precision == "fp16":
         config.set_flag(trt.BuilderFlag.FP16)