remove incorrect new in c style, test=release/1.6 (#20456)

paddle/fluid/inference/capi/c_api.h

@@ -37,7 +37,7 @@ typedef struct PD_PaddleBuf PD_PaddleBuf;
 typedef struct PD_AnalysisConfig PD_AnalysisConfig;
 
 typedef struct PD_ZeroCopyData {
-  char* name = new char[50];
+  char* name;
   void* data;
   PD_DataType dtype;
   int* shape;