Remove Get-TypeData tests

Jason Shirk of the PowerShell team removed the dependency on
Types.ps1xml, so it was removed from our produce. Therefore this test is
now deprecated.

src/pester-tests/Get-TypeData.Tests.ps1

@@ -1,17 +0,0 @@
-Describe "Get-TypeData" {
-    It "Should be able to call Get-TypeData with no arguments without throwing" {
-        { Get-TypeData } | Should Not Throw
-    }
-
-    It "Should return an array of several elements when no arguments are used" {
-        $output = Get-TypeData
-
-        $output.Length | Should BeGreaterThan 1
-    }
-
-    It "Should be able to take wildcard input" {
-        $output = Get-TypeData *Sys*
-
-        $output.Length | Should BeGreaterThan 1
-    }
-}