Update 01_javascript_refresher.md

Deleted the duplicate console.log in the JS refresher which was erroneously calling console.log(console.log(this.property)).

01_Day_JavaScript_Refresher/01_javascript_refresher.md

@@ -4348,7 +4348,7 @@ class Student extends Person {
 
 const s1 = new Student('Asabeneh', 'Yetayeh', 'Finland', 250, 'Helsinki')
 console.log(s1)
-console.log(s1.saySomething())
+s1.saySomething()
 console.log(s1.getFullName())
 console.log(s1.getPersonInfo())
 ```
@@ -4411,11 +4411,11 @@ s2.setSkill = 'Organizing'
 
 console.log(s1)
 
-console.log(s1.saySomething())
+s1.saySomething()
 console.log(s1.getFullName())
 console.log(s1.getPersonInfo())
 
-console.log(s2.saySomething())
+s2.saySomething()
 console.log(s2.getFullName())
 console.log(s2.getPersonInfo())
 ```