Remove useless #undef DWARF lines

Those lines disappear when producing omrfcf.h even if DDR is enabled.
Cmake generates makefiles which define those macros as necessary.

Signed-off-by: Keith W. Campbell <[email protected]>

Author: keithc-ca

include_core/omrcfg.h.in

@@ -224,14 +224,6 @@
  */
 #undef OMR_THR_YIELD_ALG
 
-/**
- * Dwarf
- */
-#undef HAVE_DWARF_H
-#undef HAVE_LIBDWARF_DWARF_H
-#undef HAVE_LIBDWARF_H
-#undef HAVE_LIBDWARF_LIBDWARF_H
-
 /**
  * Flag to enable integration of valgrind api.
  */