chore: use iwyu on probablity/**.cpp

probability/geometric_dist.cpp

@@ -19,14 +19,15 @@
  * @author [Domenic Zingsheim](https://github.com/DerAndereDomenic)
  */
 
-#include <cassert>   /// for assert
-#include <cmath>     /// for math functions
-#include <cstdint>   /// for fixed size data types
-#include <ctime>     /// for time to initialize rng
-#include <iostream>  /// for std::cout
-#include <limits>    /// for std::numeric_limits
-#include <random>    /// for random numbers
-#include <vector>    /// for std::vector
+#include <bits/std_abs.h>  // for abs
+#include <stdlib.h>        // for rand, srand, RAND_MAX
+#include <cassert>         // for assert
+#include <cmath>           // for log, pow, sqrt
+#include <cstdint>         // for uint32_t
+#include <ctime>           // for time
+#include <iostream>        // for basic_ostream, char_traits, operator<<, cout
+#include <limits>          // for numeric_limits
+#include <vector>          // for vector
 
 /**
  * @namespace probability