input: Write a function to remove all the whitespaces from each string in a given list of strings. The function should return a new list with each string stripped of its whitespaces.
  assert remove_whitespace(['Hello  World  ', 'Hi  there', 'Good  Morning'])==['HelloWorld', 'Hithere', 'GoodMorning']
  assert remove_whitespace(['  Python is fun  ', '  Keep coding  '])==['Pythonisfun', 'Keepcoding']
  assert remove_whitespace([])==[]
  assert remove_whitespace(['  ', '   ', '    '])==['', '', '']
output: def remove_whitespace(strings):
      return [''.join(s.split()) for s in strings]