Fix wasm_type_equal check in wasm_mini_loader.c (#1394)

Fix wasm_type_equal check error in wasm_mini_loader.c:
  wasm_type_equal(type, j) -> wasm_type_equal(type, module->types[j])
And remove unused comments in aot_runtime.h

core/iwasm/aot/aot_runtime.h

@@ -624,16 +624,6 @@ aot_get_native_addr_range(AOTModuleInstance *module_inst, uint8 *native_ptr,
 bool
 aot_enlarge_memory(AOTModuleInstance *module_inst, uint32 inc_page_count);
 
-/**
- * Compare whether two wasm types are equal according to the indexs
- *
- * @param module_inst the AOT module instance
- * @param type1_idx index of the first wasm type
- * @param type2_idx index of the second wasm type
- *
- * @return true if equal, false otherwise
- */
-
 /**
  * Invoke native function from aot code
  */