Remove spec depending on platform-dependent behavior from ungetc/lseek.
Remove spec depending on platform-dependent behavior from ungetc/lseek.

nobu/rubyspec,ruby/spec,kachick/rubyspec,ruby/spec,kachick/rubyspec,eregon/rubyspec,eregon/rubyspec,nobu/rubyspec,sgarciac/spec,sgarciac/spec,nobu/rubyspec,ruby/rubyspec,ruby/spec,ruby/rubyspec,eregon/rubyspec,kachick/rubyspec,sgarciac/spec