drm/i915/gvt: make execlist.h self-contained

Remove unused declaration.
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/e201af3bcf8e1bc389ae501ea5e3572b95e66f55.1607422863.git.jani.nikula@intel.com

drivers/gpu/drm/i915/Makefile

@@ -284,7 +284,6 @@ obj-$(CONFIG_DRM_I915_GVT_KVMGT) += gvt/kvmgt.o
 # exclude some broken headers from the test coverage
 no-header-test := \
 	display/intel_vbt_defs.h \
-	gvt/execlist.h \
 	gvt/fb_decoder.h \
 	gvt/gtt.h \
 	gvt/gvt.h \

drivers/gpu/drm/i915/gvt/execlist.h

@@ -182,7 +182,4 @@ int intel_vgpu_init_execlist(struct intel_vgpu *vgpu);
 int intel_vgpu_submit_execlist(struct intel_vgpu *vgpu,
 			       const struct intel_engine_cs *engine);
 
-void intel_vgpu_reset_execlist(struct intel_vgpu *vgpu,
-			       intel_engine_mask_t engine_mask);
-
 #endif /*_GVT_EXECLIST_H_*/