Revert "temporary debugging code for windows autobuilder test suite failure"

This reverts commit 0d9fbd18c1bd01e966cc65dfa83e43f1c60fb302.
try running test in a different directory

I have a theory that something is deleting the .t directory
or it doesn't get made in the location tried.

The last test showed:

  add:  ("recordedInodeCache",Key {keyName = "e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77", keyBackendName = "SHA256E", keySize = Just 20, keyMtime = Nothing, keyChunkSize = Nothing, keyChunkNum = Nothing},"start")
("recordedInodeCache",Key {keyName = "e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77", keyBackendName = "SHA256E", keySize = Just 20, keyMtime = Nothing, keyChunkSize = Nothing, keyChunkNum = Nothing},"end")
("writeInodeCache",Key {keyName = "e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77", keyBackendName = "SHA256E", keySize = Just 20, keyMtime = Nothing, keyChunkSize = Nothing, keyChunkNum = Nothing},"start")
git-annex: c:\jenkins\workspace\msysgit-git-annex-assistant-test\git-annex\.t\repo\.git\annex\objects\6cd\e82\SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77\SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77.cache: openFile: does not exist (No such file or directory)
FAIL
    add failed

So writeInodeCache is what's failing, and it seems to fail to write the file
despite having made the parent directory.