In this task, you need to remove all words of a given length in the sentence. The number of letters in a word determine its length, for example, the length of the word "apple" is 5.

Example Input: Sentence: 'a group of men riding skis down a snow covered slope'. Remove all words of length '6' in the given sentence.
Example Output: a group of men skis down a snow covered slope

Example Input: Sentence: 'two tennis players who are holding rackets touch hands'. Remove all words of length '5' in the given sentence.
Example Output: two tennis players who are holding rackets

Example Input: Sentence: 'a herd of sheep grazing on a lush green filed'. Remove all words of length '2' in the given sentence.
Example Output:
a herd sheep grazing a lush green filed