Clover DropTables necessary?

[llamafilm]

After installing Clover, my config.plist contains the following Drop Tables section.  My system is running okay (mostly), but my question is, why was this section added?  Is it based on my hardware, or does this get included in all default installations?  I'm wondering if deleting it might help with power management or sleep or clock drift.

<key>DropTables</key>
<array>
	<dict>
		<key>Signature</key>
		<string>DMAR</string>
	</dict>
	<dict>
		<key>Signature</key>
		<string>SSDT</string>
		<key>TableId</key>
		<string>CpuPm</string>
	</dict>
	<dict>
		<key>Signature</key>
		<string>SSDT</string>
		<key>TableId</key>
		<string>Cpu0Ist</string>
	</dict>
</array>