Revert "keep track of blob and URI, in an effort to debug IE not working"
Revert "keep track of blob and URI, in an effort to debug IE not working"

This reverts commit afd9aa882ebb2a4884ad45dbbd17dcbe264332b2.

bpowers/sd.js,bpowers/sd.js,bpowers/sd.js,bpowers/sd.js