Removed the vi format comments from the source

Vim users can use the [editorconfig plugin](https://github.com/editorconfig/editorconfig-vim) to automatically set tab spacing for the SDL coding style.

Fixes https://github.com/libsdl-org/SDL/issues/6903

src/render/opengl/SDL_glfuncs.h

@@ -474,5 +474,3 @@ SDL_PROC(void, glVertexPointer,
          (GLint size, GLenum type, GLsizei stride,
           const GLvoid *pointer))
 SDL_PROC(void, glViewport, (GLint x, GLint y, GLsizei width, GLsizei height))
-
-/* vi: set ts=4 sw=4 expandtab: */