Merge #3890

3890: Remove unused variables r=def- a=Jupeyy



## Checklist

- [ ] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test if it works standalone, system.c especially
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: Jupeyy <jupjopjap@gmail.com>

src/engine/client/backend/opengl/backend_opengl.h

@@ -134,7 +134,9 @@ class CCommandProcessorFragment_OpenGL2 : public CCommandProcessorFragment_OpenG
 	};
 	std::vector<SBufferContainer> m_BufferContainers;
 
+#ifndef BACKEND_AS_OPENGL_ES
 	GL_SVertexTex3D m_aStreamVertices[1024 * 4];
+#endif
 
 	struct SBufferObject
 	{

src/engine/client/client.cpp

@@ -4055,7 +4055,6 @@ void CClient::ToggleWindowVSync()
 void CClient::LoadFont()
 {
 	static CFont *pDefaultFont = 0;
-	static bool LoadedFallbackFont = false;
 	char aFilename[512];
 	char aBuff[1024];
 	const char *pFontFile = "fonts/DejaVuSans.ttf";
@@ -4089,7 +4088,6 @@ void CClient::LoadFont()
 				IEngineTextRender *pTextRender = Kernel()->RequestInterface<IEngineTextRender>();
 				FontLoaded = pTextRender->LoadFallbackFont(pDefaultFont, aFilename, pBuf, Size);
 			}
-			LoadedFallbackFont |= FontLoaded;
 
 			if(!FontLoaded)
 			{

src/engine/shared/snapshot.cpp

@@ -209,7 +209,6 @@ int CSnapshotDelta::CreateDelta(CSnapshot *pFrom, CSnapshot *pTo, void *pDstData
 	CSnapshotItem *pCurItem;
 	CSnapshotItem *pPastItem;
 	int Count = 0;
-	int SizeCount = 0;
 
 	pDelta->m_NumDeletedItems = 0;
 	pDelta->m_NumUpdateItems = 0;
@@ -279,7 +278,6 @@ int CSnapshotDelta::CreateDelta(CSnapshot *pFrom, CSnapshot *pTo, void *pDstData
 				*pData++ = ItemSize / 4;
 
 			mem_copy(pData, pCurItem->Data(), ItemSize);
-			SizeCount += ItemSize;
 			pData += ItemSize / 4;
 			pDelta->m_NumUpdateItems++;
 			Count++;