Revert "Cleanup: add semicolon after PyObject_VAR_HEAD"

This reverts commit a01bcfa636.

This causes MSVC2019 build to fail with error C2059

Unfortunately this means we have to put up with bad formatting
in Python structs.

source/blender/python/gpu/gpu_py_element.h

@@ -26,8 +26,7 @@ extern PyTypeObject BPyGPUIndexBuf_Type;
 #define BPyGPUIndexBuf_Check(v) (Py_TYPE(v) == &BPyGPUIndexBuf_Type)
 
 typedef struct BPyGPUIndexBuf {
-  PyObject_VAR_HEAD;
-  struct GPUIndexBuf *elem;
+  PyObject_VAR_HEAD struct GPUIndexBuf *elem;
 } BPyGPUIndexBuf;
 
 PyObject *BPyGPUIndexBuf_CreatePyObject(struct GPUIndexBuf *elem);