8351152: x86: Remove code blocks that handle UseSSE < 2

[shipilev]

WIP.

32-bit x86 was the platform that supported UseSSE < 2. 64-bit x86 baselines on UseSSE >= 2. After 32-bit x86 code is gone, we can remove all code blocks that are there to support UseSSE < 2.

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Issue

• JDK-8351152: x86: Remove code blocks that handle UseSSE < 2 (Sub-task - P4)

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