Fix bad merge.
Fix bad merge.

Summary:
FBStringTest.cpp was refactored, but the TestUtil and
TemporaryFile was not properly removed.

Reviewed By: yfeldblum

Differential Revision: D2913045

fb-gh-sync-id: 710c3f5b808acb634dfcd65219484ddc257ed52c

mqeizi/folly,charsyam/folly,facebook/folly,brunomorishita/folly,mqeizi/folly,mqeizi/folly,facebook/folly,floxard/folly,charsyam/folly,mqeizi/folly,floxard/folly,mqeizi/folly,facebook/folly,facebook/folly,Orvid/folly,charsyam/folly,rklabs/folly,Hincoin/folly,Orvid/folly,Orvid/folly,brunomorishita/folly,floxard/folly,brunomorishita/folly,Hincoin/folly,rklabs/folly,rklabs/folly,Orvid/folly,rklabs/folly,charsyam/folly,Hincoin/folly,facebook/folly,Orvid/folly,floxard/folly,Hincoin/folly,rklabs/folly,brunomorishita/folly,Hincoin/folly,brunomorishita/folly,floxard/folly