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 san francisco street corner with stop sign bike path directions and ethnic cafe'. Remove all words of length '6' in the given sentence.
Example Output: a san francisco with stop sign bike path directions and cafe

Example Input: Sentence: 'an empty side by side stainless steel refrigerator sits ajar'. Remove all words of length '4' in the given sentence.
Example Output: an empty by stainless steel refrigerator

Example Input: Sentence: 'a woman skiing down a ski slope'. Remove all words of length '4' in the given sentence.
Example Output:
a woman skiing a ski slope