Removed row data type validation for cells
Removed row data type validation for cells

This gives us a 24% increase in speed. Ill take that tradeoff against
the risk that a user will be manually hacking cells and making a mess
of it.

randym/axlsx,raghavendra-prithvi/axlsx,woto/axlsx,VueOps/axlsx,legitscript/axlsx,clarkcutler/axlsx,nilbus/axlsx,pedrogarrett/axlsx,sr-education/axlsx,mromulus/axlsx,sh-ft/axlsx,Debiancc/axlsx,bradstewart/axlsx,romuloceccon/axlsx,alexanderfrankel/axlsx,kappiah/axlsx