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 neon motion light on a black surface'. Remove all words of length '6' in the given sentence.
Example Output: a neon light on a black surface

Example Input: Sentence: 'a truck pulling a trailer in a dirt field'. Remove all words of length '2' in the given sentence.
Example Output: a truck pulling a trailer a dirt field

Example Input: Sentence: 'a mountain towers over a train going down the tracks'. Remove all words of length '4' in the given sentence.
Example Output:
a mountain towers a train going the tracks