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 steam clock on the side of the street attracts onlookers'. Remove all words of length '9' in the given sentence.
Example Output: a steam clock on the side of the street attracts

Example Input: Sentence: 'a group of people watching kites in the sky'. Remove all words of length '3' in the given sentence.
Example Output: a group of people watching kites in

Example Input: Sentence: 'a city bus drives towards a bus stop'. Remove all words of length '6' in the given sentence.
Example Output:
a city bus towards a bus stop