8212774: Remove dead code touching Klass::_lower_dimension Summary: Found dead code removal while looking at usage of Compile_lock. This dead code doesn't have Compile_lock but other code touching Klass::_{upper,lower}_dimension do. Reviewed-by: shade

/build/
/dist/
/.idea/
nbproject/private/
/webrev
/.src-rev
/.jib/
.DS_Store
.metadata/
.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
**/JTreport/**
**/JTwork/**