Remove commented code.
Merge topic 'compile-defs-debugging' into next

a288aee Remove commented code.
Refactor cmTarget::GetCompileDefinitions to use an out-vector, not a string.

Refactor to create AddCompileDefinitions.
Add target property debugging for COMPILE_DEFINITIONS

Use constructs similar to those for COMPILE_OPTIONS. This is a little
different because there is a command to remove_definitions(), so
we can't populate the equivalent target property until generate-time
in cmGlobalGenerator.
Merge topic 'compile-defs-debugging' into next

72762a3 Add target property debugging for COMPILE_DEFINITIONS
6f72f90 Refactor cmTarget::GetCompileDefinitions to use an out-vector, not a string.