Try the below steps for hiding the object in Infopath
If you need to hide Reapting table and lable in infopath then do as follow
Click on Reapting Section
Under Manage Rule Select Formatting
Add a condition as the label is blank
and check the check box for hide this control
If you need to hide label alone in infopath then do as follow
Click on that label
Under Manage Rule Select Formatting
Add a condition as the label is blank
and check the check box for hide this control