Remove inappropriate semicolons after function definitions.

Solaris Studio warns about this, and some compilers might think it's an
outright syntax error.

src/backend/utils/adt/json.c

@@ -1068,7 +1068,7 @@ array_to_json(PG_FUNCTION_ARGS)
 	array_to_json_internal(array, result, false);
 
 	PG_RETURN_TEXT_P(cstring_to_text(result->data));
-};
+}
 
 /*
  * SQL function array_to_json(row, prettybool)
@@ -1085,7 +1085,7 @@ array_to_json_pretty(PG_FUNCTION_ARGS)
 	array_to_json_internal(array, result, use_line_feeds);
 
 	PG_RETURN_TEXT_P(cstring_to_text(result->data));
-};
+}
 
 /*
  * SQL function row_to_json(row)
@@ -1101,7 +1101,7 @@ row_to_json(PG_FUNCTION_ARGS)
 	composite_to_json(array, result, false);
 
 	PG_RETURN_TEXT_P(cstring_to_text(result->data));
-};
+}
 
 /*
  * SQL function row_to_json(row, prettybool)
@@ -1118,7 +1118,7 @@ row_to_json_pretty(PG_FUNCTION_ARGS)
 	composite_to_json(array, result, use_line_feeds);
 
 	PG_RETURN_TEXT_P(cstring_to_text(result->data));
-};
+}
 
 /*
  * Produce a JSON string literal, properly escaping characters in the text.