remove used strings

Author: Steve Lee (POWERSHELL HE/HIM) (from Dev Box)

resources/windows_firewall/locales/en-us.toml

@@ -11,15 +11,10 @@ windowsOnly = "This resource is only supported on Windows"
 [get]
 rulesArrayEmpty = "The rules array cannot be empty for get operations"
 selectorRequired = "Each firewall rule in a get request must include a name"
-failedSerializeOutput = "Failed to serialize get output: %{error}"
 
 [set]
 rulesArrayEmpty = "The rules array cannot be empty for set operations"
 selectorRequired = "Each firewall rule in a set request must include a name"
-failedSerializeOutput = "Failed to serialize set output: %{error}"
-
-[export]
-failedSerializeOutput = "Failed to serialize export output: %{error}"
 
 [firewall]
 comInitFailed = "Failed to initialize COM for Windows Firewall access: %{error}"