Minor code cleanup

src/gausskernel/storage/mot/jit_exec/src/jit_llvm_query.h

@@ -64,8 +64,6 @@
 // for checking if LLVM_ENABLE_DUMP is defined and for using LLVM_VERSION_STRING
 #include "llvm/Config/llvm-config.h"
 
-extern bool GlobalCodeGenEnvironmentSuccess;
-
 namespace JitExec {
 /** @struct Holds instructions that evaluate in runtime to begin and end iterators of a cursor. */
 struct JitLlvmRuntimeCursor {

src/gausskernel/storage/mot/jit_exec/src/jit_tvm_query_codegen.h

@@ -66,4 +66,4 @@ extern int JitExecTvmQuery(JitContext* jitContext, ParamListInfo params, TupleTa
     uint64_t* tuplesProcessed, int* scanEnded, int newScan);
 }  // namespace JitExec
 
-#endif  // JIT_TVM_EXEC_H
+#endif  /* JIT_TVM_QUERY_CODEGEN_H */

src/include/storage/mot/jit_def.h

@@ -44,14 +44,9 @@
 
 namespace JitExec {
 
-// uncomment this to debug JIT execution
-//#define MOT_JIT_DEBUG
-
-// uncomment this to use advanced WHERE clause operators
-//#define MOT_JIT_ADVANCED_WHERE_OP
-
-// uncomment to enable features required for JIT testing
-//#define MOT_JIT_TEST
+// To debug JIT execution, #define MOT_JIT_DEBUG
+// To use advanced WHERE clause operators, #define MOT_JIT_ADVANCED_WHERE_OP
+// To enable features required for JIT testing, #define MOT_JIT_TEST
 
 /** @enum JitCommandType Command types supported by jitted queries. */
 enum JitCommandType : uint8_t {