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 zebra in a tall grassy field watching deer in the background'. Remove all words of length '2' in the given sentence.
Example Output: a zebra a tall grassy field watching deer the background

Example Input: Sentence: 'a double decker bus driving on a snowy day'. Remove all words of length '2' in the given sentence.
Example Output: a double decker bus driving a snowy day

Example Input: Sentence: 'a red and white bus that is parked on a track'. Remove all words of length '1' in the given sentence.
Example Output:
red and white bus that is parked on track