Redundant Assignment And Unused Variables in mkconcore.py

[saksham-gera]

• The variable CPPEXE = "g++" appears twice in the script, which is unnecessary and could be removed.

• The variables TRIMMED_LOGS and M_IS_OCTAVE are defined but do not seem to be used in the mkconcore script.

[saksham-gera]

I’ll address this issue in my next PR along with fixes for other issues.