fixed a bug in the mutator and removed old function declaration

Author: PBetzler

src/advanced_examples/custom_mutator_example_checks_test.cpp

@@ -38,5 +38,5 @@ extern "C" size_t LLVMFuzzerCustomMutator(uint8_t *Data, size_t Size,
                                           size_t MaxSize, unsigned int Seed) {
     std::cout << "In custom mutator.\n";
 
-    return Size;
+    return MaxSize;
 }

src/advanced_examples/explore_me.h

@@ -13,13 +13,4 @@ struct InputStruct {
     std::string c;
 };
 
-struct SpecialRequirementsStruct {
-    long a;
-    long b;
-    size_t c_size;
-    char* c;
-};
-
 void ExploreStructuredInputChecks(InputStruct inputStruct);
-
-void ExploreCustomMutatorExampleChecks(SpecialRequirementsStruct* specialRequirementsStruct);