drm/i915/tracepoints: Remove unused i915_gem_request_complete

Tracepoint is not used and won't be suitable for its replacement.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_trace.h

@@ -502,11 +502,6 @@ DEFINE_EVENT(i915_gem_request, i915_gem_request_retire,
 	    TP_ARGS(req)
 );
 
-DEFINE_EVENT(i915_gem_request, i915_gem_request_complete,
-	    TP_PROTO(struct drm_i915_gem_request *req),
-	    TP_ARGS(req)
-);
-
 TRACE_EVENT(i915_gem_request_wait_begin,
 	    TP_PROTO(struct drm_i915_gem_request *req, unsigned int flags),
 	    TP_ARGS(req, flags),