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 young lady is holding on to a street sign and smiling'. Remove all words of length '3' in the given sentence.
Example Output: a young lady is holding on to a street sign smiling

Example Input: Sentence: 'the zebra is looking for the tastiest grass'. Remove all words of length '2' in the given sentence.
Example Output: the zebra looking for the tastiest grass

Example Input: Sentence: 'two trains passing each other in a train station'. Remove all words of length '7' in the given sentence.
Example Output:
two trains each other in a train