memory: remove memory_region_test_and_clear_dirty

It is unused after g364fb has been converted to use DirtyBitmapSnapshot.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

include/exec/memory.h

@@ -1090,33 +1090,15 @@ bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
 void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
                              hwaddr size);
 
-/**
- * memory_region_test_and_clear_dirty: Check whether a range of bytes is dirty
- *                                     for a specified client. It clears them.
- *
- * Checks whether a range of bytes has been written to since the last
- * call to memory_region_reset_dirty() with the same @client.  Dirty logging
- * must be enabled.
- *
- * @mr: the memory region being queried.
- * @addr: the address (relative to the start of the region) being queried.
- * @size: the size of the range being queried.
- * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or
- *          %DIRTY_MEMORY_VGA.
- */
-bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
-                                        hwaddr size, unsigned client);
-
 /**
  * memory_region_snapshot_and_clear_dirty: Get a snapshot of the dirty
  *                                         bitmap and clear it.
  *
  * Creates a snapshot of the dirty bitmap, clears the dirty bitmap and
  * returns the snapshot.  The snapshot can then be used to query dirty
- * status, using memory_region_snapshot_get_dirty.  Unlike
- * memory_region_test_and_clear_dirty this allows to query the same
- * page multiple times, which is especially useful for display updates
- * where the scanlines often are not page aligned.
+ * status, using memory_region_snapshot_get_dirty.  Snapshotting allows
+ * querying the same page multiple times, which is especially useful for
+ * display updates where the scanlines often are not page aligned.
  *
  * The dirty bitmap region which gets copyed into the snapshot (and
  * cleared afterwards) can be larger than requested.  The boundaries

memory.c

@@ -1971,14 +1971,6 @@ void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
                                         memory_region_get_dirty_log_mask(mr));
 }
 
-bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
-                                        hwaddr size, unsigned client)
-{
-    assert(mr->ram_block);
-    return cpu_physical_memory_test_and_clear_dirty(
-                memory_region_get_ram_addr(mr) + addr, size, client);
-}
-
 DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr,
                                                             hwaddr addr,
                                                             hwaddr size,