[java] [student_grades] Inline variable

Author: JavierCane

examples/java/java-student_grades-02_extract_method/src/main/java/tv/codely/student_grades/StudentGradeCalculator.java

@@ -31,8 +31,6 @@ public StudentGradeCalculator(final int yearToCalculate) {
 
     public float calculateGrades(final List<Pair<Integer, Float>> examsGrades, final boolean hasReachedMinimumClasses) {
         if (!examsGrades.isEmpty()) {
-            boolean hasToIncreaseOneExtraPoint = hasToIncreaseOneExtraPoint();
-
             float gradesSum       = 0f;
             int   gradesWeightSum = 0;
 
@@ -43,7 +41,7 @@ public float calculateGrades(final List<Pair<Integer, Float>> examsGrades, final
 
             if (gradesWeightSum == 100) {
                 if (hasReachedMinimumClasses) {
-                    if (hasToIncreaseOneExtraPoint) {
+                    if (hasToIncreaseOneExtraPoint()) {
                         return Float.min(10f, gradesSum + 1);
                     } else {
                         return gradesSum;