sdl12-compat: remove unused math functions in dr_mp3.h

From dcfc0736ebdffdccba642099c2220eab24812d0e Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Fri, 8 Apr 2022 11:55:10 +0300
Subject: [PATCH] remove unused math functions in dr_mp3.h

(c.f. https://github.com/mackron/dr_libs/pull/228)
---
 src/dr_mp3.h | 23 -----------------------
 1 file changed, 23 deletions(-)

diff --git a/src/dr_mp3.h b/src/dr_mp3.h
index dad327c..d145f5c 100644
--- a/src/dr_mp3.h
+++ b/src/dr_mp3.h
@@ -2424,10 +2424,6 @@ DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num
  Main Public API
 
  ************************************************************************************************************************************************************/
-#if 0 /* not used. */
-#include <math.h>   /* For sin() and exp(). */
-#endif
-
 #if defined(SIZE_MAX)
     #define DRMP3_SIZE_MAX  SIZE_MAX
 #else
@@ -2491,25 +2487,6 @@ static DRMP3_INLINE drmp3_uint32 drmp3_gcf_u32(drmp3_uint32 a, drmp3_uint32 b)
     return a;
 }
 
-#if 0 /* not used. */
-static DRMP3_INLINE double drmp3_sin(double x)
-{
-    /* TODO: Implement custom sin(x). */
-    return sin(x);
-}
-
-static DRMP3_INLINE double drmp3_exp(double x)
-{
-    /* TODO: Implement custom exp(x). */
-    return exp(x);
-}
-
-static DRMP3_INLINE double drmp3_cos(double x)
-{
-    return drmp3_sin((DRMP3_PI_D*0.5) - x);
-}
-#endif
-
 static void* drmp3__malloc_default(size_t sz, void* pUserData)
 {
     (void)pUserData;