releng: Remove non-release plug-in/fragments from 9.1.0 baseline

The callstack plug-ins are still in development and not provided on the
Trace Compass update site. Also, the fragment for slf4j properties is
not on the update site.

Change-Id: If6086f12971012860dfccdd98b347a5587ebeda1
Signed-off-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass/org.eclipse.tracecompass/+/204461
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>

releng/org.eclipse.tracecompass.target/baseline/tracecompass-baseline-9.1.0.target

@@ -1,9 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<?pde version="3.8"?><target name="tracecompass-baseline-9.1.0" sequenceNumber="1">
+<?pde version="3.8"?><target name="tracecompass-baseline-9.1.0" sequenceNumber="2">
 <locations>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-<unit id="org.eclipse.tracecompass.analysis.callstack.core" version="0.0.0"/>
-<unit id="org.eclipse.tracecompass.analysis.callstack.ui" version="0.0.0"/>
 <unit id="org.eclipse.tracecompass.analysis.counters.core" version="0.0.0"/>
 <unit id="org.eclipse.tracecompass.analysis.counters.ui" version="0.0.0"/>
 <unit id="org.eclipse.tracecompass.analysis.graph.core" version="0.0.0"/>
@@ -34,7 +32,6 @@
 <unit id="org.eclipse.tracecompass.lttng2.ust.ui" version="0.0.0"/>
 <unit id="org.eclipse.tracecompass.pcap.core" version="0.0.0"/>
 <unit id="org.eclipse.tracecompass.segmentstore.core" version="0.0.0"/>
-<unit id="org.eclipse.tracecompass.slf4j.binding.simple.properties" version="0.0.0"/>
 <unit id="org.eclipse.tracecompass.statesystem.core" version="0.0.0"/>
 <unit id="org.eclipse.tracecompass.tmf.analysis.xml.core" version="0.0.0"/>
 <unit id="org.eclipse.tracecompass.tmf.analysis.xml.ui" version="0.0.0"/>