Revert "Added math function power (#604)" (#608)

This reverts commit 88726b9425.

DIRECTORY.md

@@ -249,8 +249,6 @@
   * [Palindrome](https://github.com/TheAlgorithms/C/blob/master/misc/palindrome.c)
   * [Pid](https://github.com/TheAlgorithms/C/blob/master/misc/pid.c)
   * [Poly Add](https://github.com/TheAlgorithms/C/blob/master/misc/poly_add.c)
-  * [Power](https://github.com/TheAlgorithms/C/blob/master/misc/power.c)
-  * [Power Recursion](https://github.com/TheAlgorithms/C/blob/master/misc/power_recursion.c)
   * [Prime](https://github.com/TheAlgorithms/C/blob/master/misc/prime.c)
   * [Prime Factoriziation](https://github.com/TheAlgorithms/C/blob/master/misc/prime_factoriziation.c)
   * [Quartile](https://github.com/TheAlgorithms/C/blob/master/misc/quartile.c)

misc/power.c

@@ -1,47 +0,0 @@
-/**
- * @file
- * @brief Program to calculate
- * [exponentiation](https://en.wikipedia.org/wiki/Exponentiation)
- *
- * @author [Du Yuanchao](https://github.com/shellhub)
- */
-#include <assert.h>
-
-/**
- * @brief Returns the value of the first argument raised to the power of the
- * second argument.
- * @param a the base.
- * @param b the exponent.
- * @returns the value {@code a}<sup>{@code b}</sup>.
- */
-long power(int a, int b)
-{
-    long result = 1;
-    for (int i = 1; i <= b; ++i)
-    {
-        result *= a;
-    }
-    return result;
-}
-
-/**
- * @brief Test function
- * @return void
- */
-static void test()
-{
-    assert(power(0, 2) == 0);
-    assert(power(2, 3) == 8);
-    assert(power(2, 10) == 1024);
-    assert(power(3, 3) == 27);
-}
-
-/**
- * @brief Driver Code
- * @returns 0 on exit
- */
-int main()
-{
-    test();
-    return 0;
-}

misc/power_recursion.c

@@ -1,40 +0,0 @@
-/**
- * @file
- * @brief Program to calculate
- * [exponentiation](https://en.wikipedia.org/wiki/Exponentiation) using
- * recursion algorithm.
- *
- * @author [Du Yuanchao](https://github.com/shellhub)
- */
-#include <assert.h>
-
-/**
- * @brief Returns the value of the first argument raised to the power of the
- * second argument using recursion.
- * @param a the base.
- * @param b the exponent.
- * @returns the value {@code a}<sup>{@code b}</sup>.
- */
-long power(int a, int b) { return b == 0 ? 1 : a * power(a, b - 1); }
-
-/**
- * @brief Test function
- * @return void
- */
-static void test()
-{
-    assert(power(0, 2) == 0);
-    assert(power(2, 3) == 8);
-    assert(power(2, 10) == 1024);
-    assert(power(3, 3) == 27);
-}
-
-/**
- * @brief Driver Code
- * @returns 0 on exit
- */
-int main()
-{
-    test();
-    return 0;
-}