Remove unnecessary inclusion of <bits/stdc++.h>

Author: lum1n0us

tests/fuzz/wasm-mutator-fuzz/wasm_mutator_fuzz.cc

@@ -10,7 +10,6 @@
 #include <string.h>
 #include <iostream>
 #include <vector>
-#include <bits/stdc++.h>
 
 using namespace std;