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 panda bear that is in its cage munching on some leaves'. Remove all words of length '5' in the given sentence.
Example Output: a bear that is in its cage munching on some leaves

Example Input: Sentence: 'the christmas tree is made of shelves of wood'. Remove all words of length '2' in the given sentence.
Example Output:
the christmas tree made shelves wood