sdl2-compat: simplified SDL_GetTicks64 implementation.

SDL Commits
1 
From 73d12aae74f4be70440911dd0fb4615453435f94 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Mon, 5 Dec 2022 12:55:00 +0300
Subject: [PATCH] simplified SDL_GetTicks64 implementation.

---
 src/sdl2_compat.c | 4 ++--
 src/sdl3_syms.h   | 1 -
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/sdl2_compat.c b/src/sdl2_compat.c
index 4a09de5..0de7fdc 100644
--- a/src/sdl2_compat.c
+++ b/src/sdl2_compat.c
@@ -861,13 +861,13 @@ SDL_CreateRGBSurfaceWithFormatFrom(void *pixels, int width, int height, int dept
 DECLSPEC Uint32
 SDLCALL SDL_GetTicks(void)
 {
-    return (Uint32) SDL3_GetTicks();
+    return (Uint32)SDL3_GetTicks();
 }
 
 DECLSPEC Uint64
 SDLCALL SDL_GetTicks64(void)
 {
-    return SDL_NS_TO_MS(SDL3_GetTicksNS());
+    return SDL3_GetTicks();
 }
 
 #ifdef __cplusplus
diff --git a/src/sdl3_syms.h b/src/sdl3_syms.h
index eaf9c30..9afe47b 100644
--- a/src/sdl3_syms.h
+++ b/src/sdl3_syms.h
@@ -501,7 +501,6 @@ SDL3_SYM_PASSTHROUGH(SDL_TLSID,TLSCreate,(void),(),return)
 SDL3_SYM_PASSTHROUGH(void*,TLSGet,(SDL_TLSID a),(a),return)
 SDL3_SYM_PASSTHROUGH(int,TLSSet,(SDL_TLSID a, const void *b, void (SDLCALL *c)(void*)),(a,b,c),return)
 SDL3_SYM(Uint64,GetTicks,(void),(),return)
-SDL3_SYM(Uint64,GetTicksNS,(void),(),return)
 SDL3_SYM_PASSTHROUGH(Uint64,GetPerformanceCounter,(void),(),return)
 SDL3_SYM_PASSTHROUGH(Uint64,GetPerformanceFrequency,(void),(),return)
 SDL3_SYM_PASSTHROUGH(void,Delay,(Uint32 a),(a),)