Bug 1449491 - Remove the unused HOME_DIR macro. r=froydnj

MozReview-Commit-ID: LSdJgmIWy4l

--HG--
extra : rebase_source : 85420290d283b62af5d8e7a0bb0500f68873ac4f

xpcom/io/nsDirectoryService.cpp

@@ -41,16 +41,6 @@
 
 using namespace mozilla;
 
-// define home directory
-// For Windows platform, We are choosing Appdata folder as HOME
-#if defined (XP_WIN)
-#define HOME_DIR NS_WIN_APPDATA_DIR
-#elif defined (MOZ_WIDGET_COCOA)
-#define HOME_DIR NS_OSX_HOME_DIR
-#elif defined (XP_UNIX)
-#define HOME_DIR NS_UNIX_HOME_DIR
-#endif
-
 //----------------------------------------------------------------------------------------
 nsresult
 nsDirectoryService::GetCurrentProcessDirectory(nsIFile** aFile)