don't save profiler if file-path not set
don't save profiler if file-path not set

This occurs when using the notebook.

clarkfitzg/dask,ssanderson/dask,pombredanne/dask,PhE/dask,ssanderson/dask,chrisbarber/dask,dask/dask,cowlicks/dask,mrocklin/dask,vikhyat/dask,jcrist/dask,cpcloud/dask,pombredanne/dask,dask/dask,PhE/dask,blaze/dask,gameduell/dask,jakirkham/dask,mraspaud/dask,clarkfitzg/dask,mikegraham/dask,mraspaud/dask,blaze/dask,ContinuumIO/dask,mrocklin/dask,vikhyat/dask,jakirkham/dask,jcrist/dask,ContinuumIO/dask