7150899: remove unused build.targets lines from jprt.properties

Reviewed-by: ohair

make/jprt.properties

@@ -154,16 +154,6 @@ jprt.build.targets.all=${jprt.build.targets.standard}, \
 jprt.build.targets.jdk8=${jprt.build.targets.all}
 jprt.build.targets.jdk7=${jprt.build.targets.all}
 jprt.build.targets.jdk7u4=${jprt.build.targets.all}
-jprt.build.targets.jdk7temp=${jprt.build.targets.all}
-jprt.build.targets.jdk7b107=${jprt.build.targets.all}
-jprt.build.targets.jdk6=${jprt.build.targets.standard}
-jprt.build.targets.jdk6perf=${jprt.build.targets.standard}
-jprt.build.targets.jdk6u10=${jprt.build.targets.standard}
-jprt.build.targets.jdk6u14=${jprt.build.targets.standard}
-jprt.build.targets.jdk6u18=${jprt.build.targets.standard}
-jprt.build.targets.jdk6u20=${jprt.build.targets.standard}
-jprt.build.targets.ejdk6=${jprt.build.targets.all}
-jprt.build.targets.ejdk7=${jprt.build.targets.all}
 jprt.build.targets=${jprt.build.targets.${jprt.tools.default.release}}
 
 # Subset lists of test targets for this source tree