drm/i915/selftest: Remove avoidable init assignment

We can skip the assignment and i915 variable
altogether and use refernce directly. Also used at
single place only.
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230307094643.532271-1-tejas.upadhyay@intel.com

drivers/gpu/drm/i915/selftests/i915_request.c

@@ -1117,9 +1117,8 @@ static int live_empty_request(void *arg)
 
 static struct i915_vma *recursive_batch(struct intel_gt *gt)
 {
-	struct drm_i915_private *i915 = gt->i915;
 	struct drm_i915_gem_object *obj;
-	const int ver = GRAPHICS_VER(i915);
+	const int ver = GRAPHICS_VER(gt->i915);
 	struct i915_vma *vma;
 	u32 *cmd;
 	int err;