revert SERIALIZE switcher of BreakingChangeAnalyzer

tools/StaticAnalysis/BreakingChangeAnalyzer/BreakingChangeAnalyzer.cs

@@ -12,7 +12,7 @@
 // limitations under the License.
 // ----------------------------------------------------------------------------------
 
-#define SERIALIZE
+// #define SERIALIZE
 
 using Newtonsoft.Json;
 using System;