fix: remove unused include in header file

PR-URL: #2624
Ref: cc98b20#r144361923
Reviewed-by: Athan Reines <[email protected]>

Author: gunjjoshi

lib/node_modules/@stdlib/math/base/special/factorial/include/stdlib/math/base/special/factorial.h

@@ -19,8 +19,6 @@
 #ifndef STDLIB_MATH_BASE_SPECIAL_FACTORIAL_H
 #define STDLIB_MATH_BASE_SPECIAL_FACTORIAL_H
 
-#include <stdint.h>
-
 /*
 * If C++, prevent name mangling so that the compiler emits a binary file having undecorated names, thus mirroring the behavior of a C compiler.
 */