remove trailing semicolon at the end of line

[dongsam]

removed trailing semicolon(;) in the statement

according to Google Python Style Guide
"Do not terminate your lines with semi-colons and do not use semi-colons to put two commands on the same line."

[tensorflow-jenkins]

Can one of the admins verify this patch?

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[dongsam]

I signed it!

[googlebot]

CLAs look good, thanks!

[drpngx]

Jenkins, test this please.