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 number of benches at the beach and a boat in the sea'. Remove all words of length '7' in the given sentence.
Example Output: a number of at the beach and a boat in the sea

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: 'two cross country skiers are standing in the snow in front of a mountain range'. Remove all words of length '7' in the given sentence.
Example Output:
two cross skiers are standing in the snow in front of a mountain range