remove incorrect todo comments about ENVCFLAGS
remove incorrect todo comments about ENVCFLAGS

Actually these variables have nothing to do with dmake, other than
originating from there. And they still make (at least some) sense,
at least I'm not aware of any way to append any CFLAGS (overriding
them in the usual make way will override only debug/optimization
flags).

Change-Id: Iec91c5c1dfbec2b683060087ac914666efa913d9

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core