drm/i915/debug: Remove default WATCH_BUF

Replaced by tracepoints.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_gem_debug.c b/drivers/gpu/drm/i915/i915_gem_debug.c
index 26e67ee..2732c90 100644
--- a/drivers/gpu/drm/i915/i915_gem_debug.c
+++ b/drivers/gpu/drm/i915/i915_gem_debug.c
@@ -52,7 +52,7 @@
 #endif /* WATCH_INACTIVE */
 
 
-#if WATCH_BUF | WATCH_EXEC | WATCH_PWRITE
+#if WATCH_EXEC | WATCH_PWRITE
 static void
 i915_gem_dump_page(struct page *page, uint32_t start, uint32_t end,
 		   uint32_t bias, uint32_t mark)