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 group of people on a street next to orange and white umbrellas'. Remove all words of length '9' in the given sentence.
Example Output: a group of people on a street next to orange and white

Example Input: Sentence: 'a green door in an alley way with an arch'. Remove all words of length '3' in the given sentence.
Example Output: a green door in an alley with an arch

Example Input: Sentence: 'a motorcycle rider and his bike fly through the air'. Remove all words of length '5' in the given sentence.
Example Output:
a motorcycle and his bike fly through the air