Do not git clean, since we do not know if the user has data dir in SR source...

Do not git clean, since we do not know if the user has data dir in SR source dir, or what they would name it (cannot .gitignore)
Fixes SiCKRAGETV/sickrage-issues/issues/2788

sickbeard/versionChecker.py

@@ -570,7 +570,7 @@ class GitUpdateManager(UpdateManager):
 
         # remove untracked files and performs a hard reset on git branch to avoid update issues
         if sickbeard.GIT_RESET:
-            self.clean()
+            #self.clean() # This is removing user data and backups
             self.reset()
 
         if self.branch == self._find_installed_branch():