Remove “Compile to CLI Tool”

I think this command is obsoleted by the ability to run (⌘R) a single file.
Use clang as default compiler (⌘R and “Insert Missing Includes”)

Clang is called via ‘xcrun clang’ so it requires that you have Xcode installed.

If you wish to use another compiler you can set ‘TM_GCC’ and ‘TM_GXX’ for C/Objective-C and C++/Objective-C++ respectively. This variable is no longer being “shell escaped” (which is what allows setting it to something like ‘xcrun clang’).