Revert #1200; it was causing #1283 breakages.

The fix for an unnecessary gap on the right of the chart turned out to
break text wrapping for ticks that were legitimately in that position.

Fixes #1283.

jquery.flot.js

@@ -1550,19 +1550,14 @@ Licensed under the MIT license.
             // jump as much around with replots
             $.each(allAxes(), function (_, axis) {
                 if (axis.reserveSpace && axis.ticks && axis.ticks.length) {
-                    var lastTick = axis.ticks[axis.ticks.length - 1];
                     if (axis.direction === "x") {
                         margins.left = Math.max(margins.left, axis.labelWidth / 2);
-                        if (lastTick.v <= axis.max) {
                         margins.right = Math.max(margins.right, axis.labelWidth / 2);
-                        }
                     } else {
                         margins.bottom = Math.max(margins.bottom, axis.labelHeight / 2);
-                        if (lastTick.v <= axis.max) {
                         margins.top = Math.max(margins.top, axis.labelHeight / 2);
                     }
                 }
-                }
             });
 
             plotOffset.left = Math.ceil(Math.max(margins.left, plotOffset.left));