Remove redundant JSON parser typedefs

JsonNonTerminal and JsonParserSem were added in commit 3311ea86ed

These names of these two enums are not actually used, so there is no
need for typedefs. Instead use plain enums to declare the constants.

Noticed by Alvaro Herera.

src/common/jsonapi.c

@@ -50,16 +50,16 @@ typedef enum					/* contexts of JSON parser */
  * tokens, non-terminals, and semantic action markers.
  */
 
-typedef enum
+enum JsonNonTerminal
 {
 	JSON_NT_JSON = 32,
 	JSON_NT_ARRAY_ELEMENTS,
 	JSON_NT_MORE_ARRAY_ELEMENTS,
 	JSON_NT_KEY_PAIRS,
 	JSON_NT_MORE_KEY_PAIRS,
-} JsonNonTerminal;
+};
 
-typedef enum
+enum JsonParserSem
 {
 	JSON_SEM_OSTART = 64,
 	JSON_SEM_OEND,
@@ -72,7 +72,7 @@ typedef enum
 	JSON_SEM_AELEM_END,
 	JSON_SEM_SCALAR_INIT,
 	JSON_SEM_SCALAR_CALL,
-} JsonParserSem;
+};
 
 /*
  * struct containing the 3 stacks used in non-recursive parsing,

src/tools/pgindent/typedefs.list

@@ -1312,14 +1312,12 @@ JsonManifestParseIncrementalState
 JsonManifestParseState
 JsonManifestSemanticState
 JsonManifestWALRangeField
-JsonNonTerminal
 JsonObjectAgg
 JsonObjectConstructor
 JsonOutput
 JsonParseExpr
 JsonParseContext
 JsonParseErrorType
-JsonParserSem
 JsonParserStack
 JsonPath
 JsonPathBool