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 men riding skis down a snow covered slope'. Remove all words of length '6' in the given sentence.
Example Output: a group of men skis down a snow covered slope

Example Input: Sentence: 'ornate dessert item on display surrounded by pans of pizza'. Remove all words of length '7' in the given sentence.
Example Output: ornate item on surrounded by pans of pizza

Example Input: Sentence: 'several kites being flown on the beach by people'. Remove all words of length '3' in the given sentence.
Example Output:
several kites being flown on beach by people