input: Write a function to remove an empty tuple from a list of tuples.
  assert remove_empty([(), (), ('',), ('a', 'b'), ('a', 'b', 'c'), ('d')])==[('',), ('a', 'b'), ('a', 'b', 'c'), 'd']  
  assert remove_empty([(), (), ('',), ("python"), ("program")])==[('',), ("python"), ("program")]  
  assert remove_empty([(), (), ('',), ("java")])==[('',),("java") ]  
  
output: def remove_empty(tuples_list):
      return [t for t in tuples_list if t]