Remove makefile dependency checks on SBSv2 builder since they don't apply.
Remove SBSv2BuilderInfo.java and functionality. That has been used for loading the SBSv2 tab, which no longer exists.
Now the SBSv2 data in the .cproject is loaded directly by the build configuration loading mechanism.
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<extension id="orgeclipsecdtdocuserwelcome-introExtension" importance="low"/>
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<extension id="org.eclipse.ui.workbench" importance="low"/>
</hidden>∑
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