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 black and white zebras congregate as a pack in the field'. Remove all words of length '4' in the given sentence.
Example Output: the black and white zebras congregate as a in the field

Example Input: Sentence: 'half a dozen donuts from krispy kreme of various different flavors'. Remove all words of length '2' in the given sentence.
Example Output: half a dozen donuts from krispy kreme various different flavors

Example Input: Sentence: 'a keyboard with red and black letters sitting next to each other'. Remove all words of length '7' in the given sentence.
Example Output:
a keyboard with red and black next to each other