fix: removing the unused feature group from the target

Author: sigmaaa

releng/com.espressif.idf.target/com.espressif.idf.target.target

@@ -15,7 +15,6 @@
 			<unit id="org.eclipse.help.feature.group" version="0.0.0"/>
 			<unit id="org.eclipse.platform.feature.group" version="0.0.0"/>
 			<unit id="org.eclipse.pde.feature.group" version="0.0.0"/>
-			<unit id="org.eclipse.sdk.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/releases/2025-09/"/>