don't print just warnings when loading backend cfg
don't print just warnings when loading backend cfg

Any warnings will be caught again when the entire config is loaded, and
duplicated in the output.

VladRassokhin/terraform,tommynsong/terraform,ewbankkit/terraform,heimweh/terraform,apparentlymart/terraform,heimweh/terraform,pdecat/terraform,hashicorp/terraform,apparentlymart/terraform,heimweh/terraform,VladRassokhin/terraform,ewbankkit/terraform,gechr/terraform,rnaveiras/terraform,hashicorp/terraform,apparentlymart/terraform,pdecat/terraform,pryorda/terraform,pdecat/terraform,VladRassokhin/terraform,heimweh/terraform,apparentlymart/terraform,pryorda/terraform,tommynsong/terraform,pdecat/terraform,ewbankkit/terraform,rnaveiras/terraform,VladRassokhin/terraform,ewbankkit/terraform,gechr/terraform,heimweh/terraform,pryorda/terraform,rnaveiras/terraform,hashicorp/terraform,gechr/terraform,tommynsong/terraform,apparentlymart/terraform