remove deprecated function #180

Job	Run time
Check Minimum Rust Version	13s
Unit Tests (stable, default)	39s
Check Semantic Versioning	16s
Unit Tests (stable, bigint)	56s
Unit Tests (stable, serde1)	42s
Unit Tests (stable, fraction1)	41s
Unit Tests (stable, bigint,serde1,fraction1)	1m 6s
Unit Tests (beta, default)	46s
Unit Tests (beta, bigint)	53s
Unit Tests (beta, serde1)	51s
Unit Tests (beta, fraction1)	47s
Unit Tests (beta, bigint,serde1,fraction1)	1m 0s
Unit Tests (nightly, default)	43s
Unit Tests (nightly, bigint)	51s
Unit Tests (nightly, serde1)	50s
Unit Tests (nightly, fraction1)	49s
Unit Tests (nightly, bigint,serde1,fraction1)	56s
	12m 59s

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