Cleanup: Remove unnecessary SHA1Transform() declaration.
Cleanup: Remove unnecessary SHA1Transform() declaration.

Nobody needs to see or call it before it is implemented down below.

BUG=None
TEST=rtc_unittests --gtest_filter=Sha1DigestTest.*
R=pthatcher@webrtc.org, tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/45039004

Patch from Thiago Farina <tfarina@chromium.org>.

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#8962}

TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc