Revert "Pull assay_type from executableName"
Revert "Pull assay_type from executableName"

This reverts commit 3da27cffeec75cacc4fa71dfb46b0ded202ecec9.

ENCODE-DCC/WranglerScripts,ENCODE-DCC/WranglerScripts,ENCODE-DCC/WranglerScripts,ENCODE-DCC/WranglerScripts