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 group of people skiing down the side of a snow covered slope'. Remove all words of length '7' in the given sentence.
Example Output: a group of people skiing down the side of a snow slope

Example Input: Sentence: 'a train stopped on the track at a station'. Remove all words of length '2' in the given sentence.
Example Output: a train stopped the track a station

Example Input: Sentence: 'stainless steel built in microwave oven with door open'. Remove all words of length '2' in the given sentence.
Example Output:
stainless steel built microwave oven with door open