glue: remove redundant check
The maximum value that GParamSpecUInt::maximum can have is indeed G_MAXUINT and that is also the upper limit for the parsed value, so any additional checks for the upper bound is unnecessary.
The maximum value that GParamSpecUInt::maximum can have is indeed G_MAXUINT and that is also the upper limit for the parsed value, so any additional checks for the upper bound is unnecessary.