Remove obsolete __thread from test-suite.
Fixes Issue 9033 - Remove __thread from the language.
Merge pull request #1616 from AndrejMitrovic/Fix9033

Issue 9033 - Remove __thread from the language.
CTFE: Remove an unused array

Slightly reduces memory usage.
Merge pull request #1698 from donc/ctfe_removevsave

CTFE: Slightly reduce memory usage