Warning in array_op

[ubaidsk]

[ 40%] Building CXX object src/libasr/CMakeFiles/asr.dir/pass/unused_functions.cpp.o
[ 42%] Building CXX object src/libasr/CMakeFiles/asr.dir/pass/flip_sign.cpp.o
/Users/ubaid/Desktop/OpenSource/lpython/src/libasr/pass/array_op.cpp:72:11: warning: private field 'remove_original_statement' is not used [-Wunused-private-field]
    bool& remove_original_statement;
          ^
[ 43%] Building CXX object src/libasr/CMakeFiles/asr.dir/pass/div_to_mul.cpp.o
[ 44%] Building CXX object src/libasr/CMakeFiles/asr.dir/pass/replace_symbolic.cpp.o
[ 45%] Building CXX object src/libasr/CMakeFiles/asr.dir/pass/intrinsic_function.cpp.o

related lfortran/lfortran#2454

[ubaidsk]

This can be tackled along the lines of lfortran/lfortran#2456.