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 street light with several street signs on it'. Remove all words of length '1' in the given sentence.
Example Output: street light with several street signs on it

Example Input: Sentence: 'a fire hydrant sits off a city street'. Remove all words of length '4' in the given sentence.
Example Output: a hydrant off a street

Example Input: Sentence: 'a little boy in blue standing under an umbrella'. Remove all words of length '3' in the given sentence.
Example Output:
a little in blue standing under an umbrella