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 containing each string with all whitespaces removed.
  assert remove_whitespace(['Hello  World  ', 'Hi  there', 'Good  Morning'])==['HelloWorld', 'Hithere', 'GoodMorning']
  assert remove_whitespace(['  This is a test  ', 'Python  ', '  Code  '])==['Thisisatest', 'Python', 'Code']
  assert remove_whitespace(['NoWhitespace'])==['NoWhitespace']
  assert remove_whitespace([])==[]
output: def remove_whitespace(strings):
      return [s.replace(" ", "") for s in strings]