Definition: 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.
Input: Sentence: 'an airplane parked on the tarmac with the door open and steps attached to the door'. Remove all words of length '6' in the given sentence.

an airplane on the with the door open and steps attached to the door