fix(EOF): Remove redundunt ext call gas cost #3630

Job	Run time
clippy	1m 25s
check serde	19s
check no-default-features	18s
check std	27s
docs	1m 8s
fmt	5s
test stable --no-default-features	1m 16s
test no_std	23s
test stable	1m 13s
test stable --all-features	2m 5s
test beta --no-default-features	47s
test beta	43s
test beta --all-features	1m 11s
test nightly --no-default-features	1m 0s
test nightly	49s
test nightly --all-features	1m 15s
	14m 24s

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