theme: Remove border from top bar

Remove the border to make the top bar a better negative space.

https://bugzilla.gnome.org/show_bug.cgi?id=669489

data/Makefile.am

@@ -31,7 +31,6 @@ dist_theme_DATA =				\
 	theme/filter-selected-rtl.svg		\
 	theme/gdm.css				\
 	theme/gnome-shell.css			\
-	theme/panel-border.svg			\
 	theme/panel-button-border.svg		\
 	theme/panel-button-highlight-narrow.svg	\
 	theme/panel-button-highlight-wide.svg	\

data/theme/gnome-shell.css

@@ -282,7 +282,6 @@ StTooltip StLabel {
 #panel {
     color: #ffffff;
     background-color: black;
-    border-image: url("panel-border.svg") 1;
     font-size: 10.5pt;
     font-weight: bold;
     height: 1.86em;
@@ -313,8 +312,6 @@ StTooltip StLabel {
     -panel-corner-background-color: black;
     -panel-corner-inner-border-width: 2px;
     -panel-corner-inner-border-color: transparent;
-    -panel-corner-outer-border-width: 1px;
-    -panel-corner-outer-border-color: #536272;
 }
 
 .panel-corner:active,

data/theme/panel-border.svg

@@ -1,33 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-
-<svg
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   width="3"
-   height="10"
-   id="svg2"
-   version="1.1">
-  <defs
-     id="defs4" />
-  <metadata
-     id="metadata7">
-  </metadata>
-  <g
-     id="layer1">
-    <rect
-       style="fill:#000000;fill-opacity:1;stroke-width:0.43599999000000000;stroke-miterlimit:4;stroke-dasharray:none"
-       id="rect3779"
-       width="3"
-       height="10"
-       x="0"
-       y="0" />
-    <rect
-       style="fill:#536272;fill-opacity:1;stroke-width:0.43599999;stroke-miterlimit:4;stroke-dasharray:none"
-       id="rect3796"
-       width="3"
-       height="1"
-       x="0"
-       y="9" />
-  </g>
-</svg>