Removed invalid spec.
Removed invalid spec.

Since immediates are all frozen by default in MRI 2.1, this spec causes
a RuntimeError trying to modify a frozen value.

BanzaiMan/rubyspec,ruby/spec,sgarciac/spec,lucaspinto/rubyspec,yous/rubyspec,askl56/rubyspec,BanzaiMan/rubyspec,jannishuebl/rubyspec,kachick/rubyspec,ruby/rubyspec,wied03/rubyspec,kidaa/rubyspec,sgarciac/spec,wied03/rubyspec,ruby/spec,eregon/rubyspec,kachick/rubyspec,nobu/rubyspec,iliabylich/rubyspec,lucaspinto/rubyspec,jannishuebl/rubyspec,benlovell/rubyspec,eregon/rubyspec,iliabylich/rubyspec,askl56/rubyspec,ruby/spec,eregon/rubyspec,wied03/rubyspec,benlovell/rubyspec,nobu/rubyspec,nobu/rubyspec,kachick/rubyspec,bl4ckdu5t/rubyspec,kidaa/rubyspec,bl4ckdu5t/rubyspec,sgarciac/spec,yous/rubyspec,ruby/rubyspec