Given the task definition and input, reply with output. 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: 'two people sitting beside each other in a row boat with small mast and sail and two oars sticking out in fairly calm water'. Remove all words of length '7' in the given sentence.

two people beside each other in a row boat with small mast and sail and two oars sticking out in fairly calm water