Remove unecessary variable or output.

src/library.cpp

@@ -42,7 +42,6 @@ Library::~Library()
 bool Library::addBook(const Book& book)
 {
   /* Try to find it */
-  std::vector<kiwix::Book>::iterator itr;
   try {
     auto& oldbook = books.at(book.getId());
     oldbook.update(book);

src/subprocess_unix.cpp

@@ -58,7 +58,6 @@ void* UnixImpl::waitForPID(void* _self)
 void UnixImpl::run(const commandLine_t& commandLine)
 {
   const char* binary = commandLine[0];
-  std::cerr << "running " << binary << std::endl;
   int pid = fork();
   switch(pid) {
     case -1: