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: 'the three giraffes are standing on the grassland'. Remove all words of length '2' in the given sentence.
Example Output: the three giraffes are standing the grassland

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 group of men playing frisbee in the middle of a busy park'. Remove all words of length '5' in the given sentence.
Example Output:
a of men playing frisbee in the middle of a busy park