fix analysis_predictor when func is called multiple times, test=release/1.6 (#21663)

Author: Shixiaowei02

paddle/fluid/inference/api/analysis_predictor.cc

@@ -122,11 +122,7 @@ bool AnalysisPredictor::PrepareScope(
     scope_ = parent_scope;
     status_is_cloned_ = true;
   } else {
-    if (config_.use_gpu_) {
-      paddle::framework::InitDevices(false);
-    } else {
-      paddle::framework::InitDevices(false, {});
-    }
+    paddle::framework::InitDevices(false);
     scope_.reset(new paddle::framework::Scope());
     status_is_cloned_ = false;
   }