Remove FX_Alloc() null checks now that it can't return NULL.

core/src/fxcrt/fxcrt_posix.cpp

Index: core/src/fxcrt/fxcrt_posix.cpp
diff --git a/core/src/fxcrt/fxcrt_posix.cpp b/core/src/fxcrt/fxcrt_posix.cpp
index 2982435c9610db4fd708a155e5555cf13b02a107..06d92c523de05862ea39d2048f16af9dd38095ff 100644
--- a/core/src/fxcrt/fxcrt_posix.cpp
+++ b/core/src/fxcrt/fxcrt_posix.cpp
@@ -165,9 +165,6 @@ FX_BOOL FX_File_Copy(FX_BSTR fileNameSrc, FX_BSTR fileNameDst)
     }
     size_t num = 0;
     FX_LPBYTE pBuffer = FX_Alloc(FX_BYTE, 32768);
-    if (!pBuffer) {
-        return FALSE;
-    }
     num = src.Read(pBuffer, 32768);
     while (num) {
         if (dst.Write(pBuffer, num) != num) {