Remove unused code and test

Author: Gijsreyn

dsc/locales/en-us.toml

@@ -160,5 +160,4 @@ failedToAbsolutizePath = "Error making config path absolute"
 failedToGetParentPath = "Error reading config path parent"
 dscConfigRootAlreadySet = "The current value of DSC_CONFIG_ROOT env var will be overridden"
 settingDscConfigRoot = "Setting DSC_CONFIG_ROOT env var as"
-stdinNotAllowedForBothParametersAndInput = "Cannot read from STDIN for both parameters and input."
 removingUtf8Bom = "Removing UTF-8 BOM from input"

dsc/src/util.rs

@@ -448,10 +448,6 @@ pub fn get_input(input: Option<&String>, file: Option<&String>, parameters_from_
         // check if need to read from STDIN
         if path == "-" {
             info!("{}", t!("util.readingInputFromStdin"));
-            if parameters_from_stdin {
-                error!("{}", t!("util.stdinNotAllowedForBothParametersAndInput"));
-                exit(EXIT_INVALID_INPUT);
-            }
             let mut stdin = Vec::<u8>::new();
             match std::io::stdin().read_to_end(&mut stdin) {
                 Ok(_) => {

dsc/tests/dsc_parameters.tests.ps1

@@ -380,20 +380,6 @@ Describe 'Parameters tests' {
       $out.results[0].result.inDesiredState | Should -Be $IsWindows
     }
 
-    It 'Parameters and input cannot both be from STDIN' {
-      $params = @{
-        parameters = @{
-          osFamily = 'Windows'
-        }
-      } | ConvertTo-Json -Compress
-
-      $out = $params | dsc config -f - test -f - 2> $TestDrive/error.log
-      $LASTEXITCODE | Should -Be 4
-      $out | Should -BeNullOrEmpty
-      $errorMessage = Get-Content -Path $TestDrive/error.log -Raw
-      $errorMessage | Should -BeLike "*ERROR*Cannot read from STDIN for both parameters and input*"
-    }
-
     It 'Invalid parameters read from STDIN result in error' {
       $params = @{
         osFamily = 'Windows'