Remove outdated value source comment

internal/cloud/backend_context.go

@@ -296,13 +296,7 @@ func (v *remoteStoredVariableValue) ParseVariableValue(mode configs.VariablePars
 	}
 
 	return &terraform.InputValue{
-		Value: val,
-
-		// We mark these as "from input" with the rationale that entering
-		// variable values into the HCP Terraform or Enterprise UI is,
-		// roughly speaking, a similar idea to entering variable values at
-		// the interactive CLI prompts. It's not a perfect correspondance,
-		// but it's closer than the other options.
+		Value:      val,
 		SourceType: terraform.ValueFromCloud,
 	}, diags
 }