return statement error

Hello! I have been having some issues with return statments!

For this code, it gives me an error that the last return can't be reached.

public class GrapeVineBlockValidPlacementConditionProcedure {
	public static boolean execute(LevelAccessor world, double x, double y, double z) {
		if ((world.getBlockState(new BlockPos((int) (Math.floor(x)), (int) (Math.floor(y)), (int) (Math.floor(z))))).getBlock() == Blocks.AIR) {
			return false;
		} else {
			return true;
		}
		return false;
	}
}

public class GrapeVineBlockValidPlacementConditionProcedure {
	public static boolean execute(LevelAccessor world, double x, double y, double z) {
		if ((world.getBlockState(new BlockPos((int) (Math.floor(x)), (int) (Math.floor(y)), (int) (Math.floor(z))))).getBlock() == Blocks.AIR) {
			return false;
		} else {
			return true;
		}
	}
}

But if I remove it, it will tell me that It needs to end in a valid return statement.