8261399: Cleanup code based on code review comments

[jayathirthrao]

Cleanup based on review comments in openjdk/jdk#2403

This PR handles :
Removing incorrect maxNativeTextureSize comment : openjdk/jdk#2403 (comment)
Removes import in CGraphicsConfig.java : openjdk/jdk#2403 (comment)
Removes OpenGL comments in MTLContext : openjdk/jdk#2403 (comment) , openjdk/jdk#2403 (comment)

---

Progress

• Change must not contain extraneous whitespace

Issue

• JDK-8261399: Cleanup code based on code review comments

Download

$ git fetch https://git.openjdk.java.net/lanai pull/176/head:pull/176
$ git checkout pull/176

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[openjdk]

@jayathirthrao This change now passes all automated pre-integration checks.

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8261399: Cleanup code based on code review comments

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[mlbridge]

Webrevs

• 00: Full (b19a7a5)

[jayathirthrao]

/integrate

[openjdk]

@jayathirthrao Pushed as commit 131a603.

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