Revert PYTHON_VERBOSE=2 used to help debug python_antlr_runtime fetch issues.
Revert PYTHON_VERBOSE=2 used to help debug python_antlr_runtime fetch issues.

(sapling split of c745babdad65cf535229f3b753a0d76a48f9c18e)
pantsbuild/pants,square/pants,digwanderlust/pants,slyphon/pants,qma/pants,15Dkatz/pants,foursquare/pants,twitter/pants,cevaris/pants,dturner-tw/pants,tdyas/pants,di0spyr0s/pants,mateor/pants,dgomez10/xanon,jessrosenfield/pants,sid-kap/pants,pgroudas/pants,lahosken/pants,jtrobec/pants,foursquare/pants,megaserg/pants,scode/pants,pgroudas/pants,tdyas/pants,megaserg/pants,laurentgo/pants,baroquebobcat/pants,ity/pants,foursquare/pants,tdyas/pants,laurentgo/pants,landism/pants,TansyArron/pants,sid-kap/pants,wisechengyi/pants,tdyas/pants,cevaris/pants,sameerparekh/pants,jtrobec/pants,di0spyr0s/pants,sameerparekh/pants,kwlzn/pants,twitter/pants,twitter/pants,sameerparekh/pants,kwlzn/pants,jtrobec/pants,scode/pants,wisechengyi/pants,laurentgo/pants,slyphon/pants,digwanderlust/pants,dbentley/pants,baroquebobcat/pants,sid-kap/pants,15Dkatz/pants,slyphon/pants,pantsbuild/pants,jessrosenfield/pants,sameerparekh/pants,digwanderlust/pants,Gabriel439/pants,twitter/pants,dbentley/pants,areitz/pants,jsirois/pants,tejal29/pants,fkorotkov/pants,tdyas/pants,pantsbuild/pants,gmalmquist/pants,fkorotkov/pants,manasapte/pants,landism/pants,fkorotkov/pants,UnrememberMe/pants,mateor/pants,foursquare/pants,di0spyr0s/pants,wisechengyi/pants,pantsbuild/pants,pombredanne/pants,dgomez10/xanon,landism/pants,Gabriel439/pants,15Dkatz/pants,digwanderlust/pants,wisechengyi/pants,TansyArron/pants,dgomez10/xanon,slyphon/pants,manasapte/pants,baroquebobcat/pants,UnrememberMe/pants,dgomez10/xanon,digwanderlust/pants,15Dkatz/pants,baroquebobcat/pants,dgomez10/xanon,lahosken/pants,pantsbuild/pants,wisechengyi/pants,dbentley/pants,jsirois/pants,tdyas/pants,mateor/pants,mateor/pants,fkorotkov/pants,benjyw/pants,dbentley/pants,pantsbuild/pants,peiyuwang/pants,benjyw/pants,pgroudas/pants,15Dkatz/pants,pombredanne/pants,gmalmquist/pants,peiyuwang/pants,jtrobec/pants,mateor/pants,kwlzn/pants,tdyas/pants,sameerparekh/pants,benjyw/pants,ericzundel/pants,mateor/pants,square/pants,benjyw/pants,mateor/pants,jtrobec/pants,gmalmquist/pants,pantsbuild/pants,twitter/pants,lahosken/pants,peiyuwang/pants,kslundberg/pants,landism/pants,jessrosenfield/pants,dbentley/pants,kslundberg/pants,sid-kap/pants,laurentgo/pants,megaserg/pants,dturner-tw/pants,manasapte/pants,landism/pants,peiyuwang/pants,kwlzn/pants,ity/pants,qma/pants,twitter/pants,dgomez10/xanon,ericzundel/pants,cevaris/pants,twitter/pants,digwanderlust/pants,ity/pants,pgroudas/pants,UnrememberMe/pants,mateor/pants,qma/pants,tdyas/pants,ity/pants,UnrememberMe/pants,lahosken/pants,slyphon/pants,foursquare/pants,landism/pants,UnrememberMe/pants,kslundberg/pants,scode/pants,baroquebobcat/pants,Gabriel439/pants,megaserg/pants,pombredanne/pants,di0spyr0s/pants,megaserg/pants,wisechengyi/pants,tejal29/pants,benjyw/pants,wisechengyi/pants,cevaris/pants,tejal29/pants,kwlzn/pants,areitz/pants,megaserg/pants,gmalmquist/pants,dturner-tw/pants,foursquare/pants,gmalmquist/pants,tejal29/pants,benjyw/pants,dgomez10/xanon,ericzundel/pants,dgomez10/xanon,areitz/pants,UnrememberMe/pants,15Dkatz/pants,qma/pants,qma/pants,kwlzn/pants,tdyas/pants,qma/pants,jessrosenfield/pants,TansyArron/pants,kslundberg/pants,UnrememberMe/pants,pombredanne/pants,jessrosenfield/pants,lahosken/pants,kslundberg/pants,peiyuwang/pants,di0spyr0s/pants,megaserg/pants,wisechengyi/pants,ericzundel/pants,landism/pants,laurentgo/pants,dgomez10/xanon,landism/pants,sameerparekh/pants,twitter/pants,15Dkatz/pants,lahosken/pants,Gabriel439/pants,TansyArron/pants,gmalmquist/pants,sameerparekh/pants,scode/pants,Gabriel439/pants,pombredanne/pants,benjyw/pants,slyphon/pants,foursquare/pants,cevaris/pants,ericzundel/pants,qma/pants,fkorotkov/pants,areitz/pants,ity/pants,baroquebobcat/pants,baroquebobcat/pants,fkorotkov/pants,jessrosenfield/pants,scode/pants,lahosken/pants,peiyuwang/pants,ericzundel/pants,ericzundel/pants,kwlzn/pants,manasapte/pants,square/pants,scode/pants,pgroudas/pants,sid-kap/pants,fkorotkov/pants,dgomez10/xanon,peiyuwang/pants,TansyArron/pants,jessrosenfield/pants,slyphon/pants,scode/pants,di0spyr0s/pants,pombredanne/pants,manasapte/pants,foursquare/pants,pombredanne/pants,dbentley/pants,jtrobec/pants,lahosken/pants,ericzundel/pants,fkorotkov/pants,baroquebobcat/pants,dbentley/pants,ity/pants,twitter/pants,tejal29/pants,Gabriel439/pants,dturner-tw/pants,peiyuwang/pants,15Dkatz/pants,cevaris/pants,ity/pants,wisechengyi/pants,Gabriel439/pants,dturner-tw/pants,gmalmquist/pants,areitz/pants,di0spyr0s/pants,sid-kap/pants,jsirois/pants,laurentgo/pants,areitz/pants,TansyArron/pants,kslundberg/pants,foursquare/pants,square/pants,UnrememberMe/pants,manasapte/pants,manasapte/pants,kslundberg/pants,TansyArron/pants,areitz/pants,dturner-tw/pants,jtrobec/pants,sid-kap/pants,pgroudas/pants,baroquebobcat/pants,cevaris/pants,dgomez10/xanon,dturner-tw/pants,UnrememberMe/pants