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 row of park benches sitting next to a park'. Remove all words of length '7' in the given sentence.
Example Output: a row of park next to a park

Example Input: Sentence: 'a guy looks at his computer while sitting at his desk'. Remove all words of length '3' in the given sentence.
Example Output: a looks at computer while sitting at desk

Example Input: Sentence: 'a train traveling down train tracks next to a bridge'. Remove all words of length '5' in the given sentence.
Example Output:
a traveling down tracks next to a bridge