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 toasted sub sandwich is next to a salad'. Remove all words of length '3' in the given sentence.
Example Output: a toasted sandwich is next to a salad

Example Input: Sentence: 'a black and whit picture of someone on a skateboard'. Remove all words of length '1' in the given sentence.
Example Output: black and whit picture of someone on skateboard

Example Input: Sentence: 'a truck stop sign in the middle of an empty field'. Remove all words of length '1' in the given sentence.
Example Output:
truck stop sign in the middle of an empty field