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.

Sentence: 'a man is cooking at a stove next to a table with a wine glass and vase on it'. Remove all words of length '7' in the given sentence.
a man is at a stove next to a table with a wine glass and vase on it