[misc] Deleted 3 debug messages in codegen_cc.cpp (#2158)
[misc] Deleted 3 debug messages in codegen_cc.cpp (#2158)

Co-authored-by: Leon Zhang <b8b17de8f6b403733bb321661b57d1ee62924b84@wisc.edu>
yuanming-hu/taichi,yuanming-hu/taichi,yuanming-hu/taichi,yuanming-hu/taichi