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: 'there is a red heart kite being flown in the sky'. Remove all words of length '5' in the given sentence.
Example Output: is a red kite in the sky

Example Input: Sentence: 'a toddler standing next to a sheep pen'. Remove all words of length '4' in the given sentence.
Example Output: a toddler standing to a sheep pen

Example Input: Sentence: 'an elephant walking across a field near a fence'. Remove all words of length '5' in the given sentence.
Example Output:
an elephant walking across a near a