8021977: Opening a file using java.io can throw IOException on Windows
Summary: Remove IOException related error-handling code for backward compatibility
Reviewed-by: alanb, lancea, mr
^build/
^dist/
/nbproject/private/
^src/share/tools/hsdis/build/
^src/share/tools/IdealGraphVisualizer/[a-zA-Z0-9]*/build/
^src/share/tools/IdealGraphVisualizer/build/
^src/share/tools/IdealGraphVisualizer/dist/
^.hgtip
.DS_Store