No implementation for `bool cling::utils::platform::osx::GetISysRoot(std::string&, bool);`

[dennisklein]

• [x] Checked for duplicates

Describe the bug

In the cling source tree:

❯ grep -R -n GetISysRoot
include/cling/Utils/Platform.h:98:  bool GetISysRoot(std::string& SysRoot, bool Verbose = false);

Expected behavior

I guess the declaration was meant to be removed together with c23abbc88b6ee61b966291c785794743b1bd5c62?

Setup

Cling version: master branch @ v0.9-102-g5754b5ad