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: 'a baseball player is in the batters box and has his bat back as a pitch is thrown to him and another person holding a glove is next to second base'. Remove all words of length '7' in the given sentence.

a baseball player is in the box and has his bat back as a pitch is thrown to him and person a glove is next to second base