Remove release notes file functionality. (#11)

* Add ConvertFrom-Iterm2ColorScheme and update Import to use it.
* Add argument completers for ColorScheme and Profile names.
* Add support for removing profile settings by passing empty string.
* Standardize on ConfirmImpact="high" for remove commands.

Module.Build.ps1

@@ -378,11 +378,6 @@ Task Publish -If ($NuGetApiKey) Build, Test, BuildHelp, GenerateFileCatalog, {
         $publishParams['Repository'] = $PublishRepository
     }
 
-    # Consider not using -ReleaseNotes parameter when Update-ModuleManifest has been fixed.
-    if ($ReleaseNotesPath) {
-        $publishParams['ReleaseNotes'] = @(Get-Content $ReleaseNotesPath)
-    }
-
     "Calling Publish-Module..."
     Publish-Module @publishParams
 }

Module.BuildSettings.ps1

@@ -123,11 +123,6 @@ $NuGetApiKey = $env:PowershellGalleryKey
 [System.Diagnostics.CodeAnalysis.SuppressMessage('PSUseDeclaredVarsMoreThanAssigments', '')]
 $PublishRepository = "PSGallery"
 
-# Path to the release notes file.  Set to $null if the release notes reside in the manifest file.
-# The contents of this file are used during publishing for the ReleaseNotes parameter.
-[System.Diagnostics.CodeAnalysis.SuppressMessage('PSUseDeclaredVarsMoreThanAssigments', '')]
-$ReleaseNotesPath = 'ReleaseNotes.txt'
-
 # ----------------------- Misc properties ---------------------------------
 
 # In addition, PFX certificates are supported in an interactive scenario only,