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: 'this amtrak train is making its way down the tracks'. Remove all words of length '4' in the given sentence.
Example Output: amtrak train is making its way the tracks

Example Input: Sentence: 'a brown bear is standing at the base of the tree'. Remove all words of length '3' in the given sentence.
Example Output: a brown bear is standing at base of tree

Example Input: Sentence: 'a broken up toilet on the sidewalk'. Remove all words of length '1' in the given sentence.
Example Output:
broken up toilet on the sidewalk