Remove no-op std::max call

This was calling std::max on an unsigned integer and 0, which is
essentially no-op. Remove this code.

Test: Build
Bug: 37752547
Change-Id: I74ce45b95960621dff11f574fbe1af60ad147cf0

libs/hwui/JankTracker.cpp

@@ -265,7 +265,6 @@ void JankTracker::addFrame(const FrameInfo& frame) {
                 / kSlowFrameBucketIntervalMs;
         framebucket = std::min(framebucket,
                 static_cast<uint32_t>(mData->slowFrameCounts.size() - 1));
-        framebucket = std::max(framebucket, 0u);
         mData->slowFrameCounts[framebucket]++;
     }