RTL: Remove Surplus PM Post Profile Border CSS Rule

When using an RTL language, if you view a PM there a line of code in the bidi stylesheet for the post profile border which is not used because the rule above it for all post profiles does the same thing.

File:

bidi.css

Delete:

.rtl .pm .postprofile {

    border-right-width: 1px;

    border-right-style: solid;

    border-left: none;

}