Remove unused code

[christiemolloy]

Need to check this in qaprod / application services ui running all modules

Right before summit there was a bug in PatternFly that was causing the select toggle border to disappear. This CSS was added as a temporary fix but I don't believe its needed anymore. Please double check

OpenshiftStreams.css

.pf-c-select__toggle:before {
  border-top: 1px solid var(--pf-c-select__toggle--before--BorderTopColor);
  border-right: 1px solid var(--pf-c-select__toggle--before--BorderRightColor);
  border-bottom: 1px solid var(--pf-c-select__toggle--before--BorderBottomColor);
  border-left: 1px solid var(--pf-c-select__toggle--before--BorderLeftColor);
}

StreamsToolbar.css file

.pf-c-select__toggle:before {
  border-top: 1px solid var(--pf-c-select__toggle--before--BorderTopColor);
  border-right: 1px solid var(--pf-c-select__toggle--before--BorderRightColor);
  border-bottom: 1px solid var(--pf-c-select__toggle--before--BorderBottomColor);
  border-left: 1px solid var(--pf-c-select__toggle--before--BorderLeftColor);
}