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 man is crouched down by a big elephant'. Remove all words of length '3' in the given sentence.
Example Output: a is crouched down by a elephant

Example Input: Sentence: 'an elephant eating a tree branch in a bare field'. Remove all words of length '2' in the given sentence.
Example Output: elephant eating a tree branch a bare field

Example Input: Sentence: 'a light house is lit on a night shore'. Remove all words of length '3' in the given sentence.
Example Output:
a light house is on a night shore