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 man is riding a motorcycle down the street'. Remove all words of length '3' in the given sentence.
Example Output: a is riding a motorcycle down street

Example Input: Sentence: 'a woman helping a man tie his windsor knot tie'. Remove all words of length '5' in the given sentence.
Example Output: a helping a man tie his windsor knot tie

Example Input: Sentence: 'an airplane flying in the sky above a mountain'. Remove all words of length '1' in the given sentence.
Example Output:
an airplane flying in the sky above mountain