advpack/tests: Use the global "current directory" variable.

dlls/advpack/tests/files.c

@@ -474,7 +474,6 @@ static void test_AdvInstallFile(void)
 {
     HRESULT hr;
     HMODULE hmod;
-    char CURR_DIR[MAX_PATH];
     char destFolder[MAX_PATH];
 
     hmod = LoadLibrary("setupapi.dll");
@@ -486,8 +485,6 @@ static void test_AdvInstallFile(void)
 
     FreeLibrary(hmod);
 
-    GetCurrentDirectoryA(MAX_PATH, CURR_DIR);
-
     lstrcpyA(destFolder, CURR_DIR);
     lstrcatA(destFolder, "\\");
     lstrcatA(destFolder, "dest");