Build warnings on fresh clone

[rebcabin]

[ 74%] Building CXX object src/libasr/CMakeFiles/asr.dir/codegen/llvm_utils.cpp.o
/Users/brian/CLionProjects/lpython/src/libasr/codegen/llvm_utils.cpp:2650:61: warning: unused parameter 'list_type' [-Wunused-parameter]
    void LLVMList::reverse(llvm::Value* list, ASR::ttype_t* list_type, llvm::Module& module) {
                                                            ^
/Users/brian/CLionProjects/lpython/src/libasr/codegen/llvm_utils.cpp:3169:42: warning: unused parameter 'module' [-Wunused-parameter]
                           llvm::Module& module) {
                                         ^
2 warnings generated.
[ 75%] Linking CXX static library libasr.a
[ 75%] Built target asr
[ 78%] Building CXX object src/lpython/CMakeFiles/lpython_lib.dir/semantics/python_ast_to_asr.cpp.o
[ 78%] Building CXX object src/lpython/CMakeFiles/lpython_lib.dir/parser/tokenizer.cpp.o
[ 80%] Building CXX object src/lpython/CMakeFiles/lpython_lib.dir/parser/parser.tab.cc.o
[ 80%] Building CXX object src/lpython/CMakeFiles/lpython_lib.dir/parser/parser.cpp.o
[ 82%] Building CXX object src/lpython/CMakeFiles/lpython_lib.dir/utils.cpp.o
[ 83%] Building CXX object src/lpython/CMakeFiles/lpython_lib.dir/python_serialization.cpp.o
[ 83%] Building CXX object src/lpython/CMakeFiles/lpython_lib.dir/python_evaluator.cpp.o
[ 85%] Building CXX object src/lpython/CMakeFiles/lpython_lib.dir/__/bin/tpl/whereami/whereami.cpp.o
[ 86%] Building CXX object src/lpython/CMakeFiles/lpython_lib.dir/pickle.cpp.o
parser.tab.cc:2929:9: warning: variable 'yynerrs' set but not used [-Wunused-but-set-variable]
    int yynerrs;
        ^
1 warning generated.
[ 87%] Linking CXX static library liblpython_lib.a

[Smit-create]

This will be probably fixed by #1888