remove unused text

Author: SteveL-MSFT

lib/dsc-lib/locales/en-us.toml

@@ -80,7 +80,6 @@ circularDependency = "Circular dependency or unresolvable parameter references d
 userFunctionAlreadyDefined = "User function '%{name}' in namespace '%{namespace}' is already defined"
 addingUserFunction = "Adding user function '%{name}'"
 skippingOutput = "Skipping output for '%{name}' due to condition evaluating to false"
-outputValueNotDefined = "Output value '%{name}' is not defined"
 secureOutputSkipped = "Secure output '%{name}' is skipped"
 outputTypeNotMatch = "Output '%{name}' type does not match expected type '%{expected_type}'"
 copyNotSupported = "Copy for output '%{name}' is currently not supported"