refactor(build): graduate libtreesitter features which are 1+ years old

src/nvim/lua/treesitter.c

@@ -152,9 +152,7 @@ void tslua_init(lua_State *L)
   build_meta(L, TS_META_QUERYCURSOR, querycursor_meta);
   build_meta(L, TS_META_TREECURSOR, treecursor_meta);
 
-#ifdef NVIM_TS_HAS_SET_ALLOCATOR
   ts_set_allocator(xmalloc, xcalloc, xrealloc, xfree);
-#endif
 }
 
 int tslua_has_language(lua_State *L)
@@ -1321,11 +1319,7 @@ static int node_rawquery(lua_State *L)
   } else {
     cursor = ts_query_cursor_new();
   }
-  // TODO(clason): API introduced after tree-sitter release 0.19.5
-  // remove guard when minimum ts version is bumped to 0.19.6+
-#ifdef NVIM_TS_HAS_SET_MATCH_LIMIT
   ts_query_cursor_set_match_limit(cursor, 64);
-#endif
   ts_query_cursor_exec(cursor, query, node);
 
   bool captures = lua_toboolean(L, 3);