disable PT2 benchmarks until we investigate the noisy reports (#1932)

Summary:
There have been many reports lately and they're not very actionable. It is time to actually investigate them instead of creating more issues every night. Until we investigate, the stats are noisy and not useful anyway.

Pull Request resolved: #1932

Reviewed By: xuzhao9

Differential Revision: D49597300

Pulled By: janeyx99

fbshipit-source-id: cfe33658ce6877a7e20a0ab77f5f0a81ce02bf79

userbenchmark/optim/run.py

@@ -60,7 +60,7 @@ def get_unstable_models() -> Set[str]:
 
 OPTIM_NAMES = [o.__name__ for o in [Adadelta, Adagrad, Adam, AdamW, Adamax, ASGD, SGD, RAdam, Rprop, RMSprop, NAdam, SparseAdam]]
 
-FUNC_STRS = ['pt2_' , '']
+FUNC_STRS = ['']
 
 OPTIMIZERS = [
     (Adadelta, {}),