Revert "fread - 19th attempt for over map on Windows"
Revert "fread - 19th attempt for over map on Windows"

This reverts commit 3ee6de214198c8f7c1c7daa2c09549b5b7b31d65.

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