Review libc dependency

src/core.c

@@ -165,7 +165,7 @@
 #include <stdio.h>                  // Required for: sprintf() [Used in OpenURL()]
 #include <string.h>                 // Required for: strrchr(), strcmp(), strlen()
 #include <time.h>                   // Required for: time() [Used in InitTimer()]
-#include <math.h>                   // Required for: tan() [Used in BeginMode3D()]
+#include <math.h>                   // Required for: tan() [Used in BeginMode3D()], atan2f() [Used in InitVrSimulator()]
 
 #include <sys/stat.h>               // Required for: stat() [Used in GetFileModTime()]
 

src/rlgl.h

@@ -682,7 +682,6 @@ RLAPI Texture2D rlGenTextureBRDF(Shader shader, int size);              // Gener
 
 #include <stdlib.h>                     // Required for: malloc(), free()
 #include <string.h>                     // Required for: strcmp(), strlen() [Used in rlglInit(), on extensions loading]
-#include <math.h>                       // Required for: atan2f()
 
 #if defined(GRAPHICS_API_OPENGL_11)
     #if defined(__APPLE__)