Revert the commits for debugging in Travis.

Revert "Extra diagnostics to debug a Travis failure."
This reverts commit 7792052aee3641371bac752c2125584312b91b4a.

Revert "Get the verbose output of Git.t for debugging the naming problem."
This reverts commit 8a80c1dded3b19218681de29f039b348658b92b8.

Revert "Narrowing it down to tag()."
This reverts commit 7ebdbfe90eeb984ba18be79d99b4fada1f2994bb.