Revert "fread - 16th attempt for over map on Windows"
Revert "fread - 16th attempt for over map on Windows"

This reverts commit 2970de6763bcab302b08ebadc6fe62acee661f54.

Rdatatable/data.table,jangorecki/data.table,vlulla/data.table,jangorecki/data.table,vlulla/data.table,jangorecki/data.table,vlulla/data.table,Rdatatable/data.table,Rdatatable/data.table,jangorecki/data.table,vlulla/data.table,Rdatatable/data.table