[java/annalyns-infiltration] Remove knightIsAwake from examples in comments (#2356)

This is to try make it clearer that the example in the comment isn't
the solution for the task.

Resolves exercism/java-analyzer#188

Author: kahgoh

analyzer-comments/java/annalyns-infiltration/avoid_boolean_literal_returns.md

@@ -6,12 +6,12 @@ Example :
 
 ```java
 // instead of
-if (knightIsAwake) {
+if (someExpression) {
   return true;
 } else {
   return false;
 }
 
 // ... return the expression directly
-return knightIsAwake;
+return someExpression;
 ```

analyzer-comments/java/annalyns-infiltration/avoid_comparison_with_literal.md

@@ -4,8 +4,8 @@ Instead of comparing booleans with the literal values, it can be simplified to j
 
 ```java
 // instead of
-return knightIsAwake == true;
+return someBoolVariable == true;
 
 // use
-return knightIsAwake;
+return someBoolVariable;
 ```