Build: Enable "unused" option in jshint - Remove unused variables from codebase. - Closes gh-788

Squashed commit of the following:

commit 7f19f92c646f180bc067bb24123175251a64a9d6
Author: Mike Sherov <mike.sherov@gmail.com>
Date:   Tue Oct 23 10:34:28 2012 -0400

    put back in fake args for signatures that we want to keep

commit 257505a9e69da0c53e3a989dab87a13112045a29
Author: Mike Sherov <mike.sherov@gmail.com>
Date:   Tue Oct 23 08:10:20 2012 -0400

    changes per @scott_gonzalez

commit 12725480cb58e70865e5aa6e735009b6b035c8f3
Author: Mike Sherov <mike.sherov@gmail.com>
Date:   Mon Oct 22 22:54:05 2012 -0400

    clean up unused vars in ui directory

commit 563595e7aee5d4a5c096b2d1de655abdf920aacd
Author: Mike Sherov <mike.sherov@gmail.com>
Date:   Mon Oct 22 22:37:42 2012 -0400

    clean up unused vars in grunt and tests

4 files changed, 8 insertions, 8 deletions

diff --git a/tests/unit/selectable/selectable_core.js b/tests/unit/selectable/selectable_core.js
index 18ea3a302..d2e885fc7 100644
--- a/tests/unit/selectable/selectable_core.js
+++ b/tests/unit/selectable/selectable_core.js
@@ -4,7 +4,7 @@
 
 var el;
 
-var drag = function(dx, dy) {
+TestHelpers.selectableDrag = function drag(dx, dy) {
 	var off = el.offset(), pos = { clientX: off.left, clientY: off.top };
 	el.simulate("mousedown", pos);
 	$(document).simulate("mousemove", pos);
diff --git a/tests/unit/selectable/selectable_events.js b/tests/unit/selectable/selectable_events.js
index 2623818a7..bfd431bd8 100644
--- a/tests/unit/selectable/selectable_events.js
+++ b/tests/unit/selectable/selectable_events.js
@@ -9,7 +9,7 @@ test("start", function() {
 	expect(2);
 	el = $("#selectable1");
 	el.selectable({
-		start: function(ev, ui) {
+		start: function() {
 			ok(true, "drag fired start callback");
 			equal(this, el[0], "context of callback");
 		}
@@ -21,7 +21,7 @@ test("stop", function() {
 	expect(2);
 	el = $("#selectable1");
 	el.selectable({
-		start: function(ev, ui) {
+		start: function() {
 			ok(true, "drag fired stop callback");
 			equal(this, el[0], "context of callback");
 		}
diff --git a/tests/unit/selectable/selectable_methods.js b/tests/unit/selectable/selectable_methods.js
index dbc88f269..ee7242d9b 100644
--- a/tests/unit/selectable/selectable_methods.js
+++ b/tests/unit/selectable/selectable_methods.js
@@ -21,7 +21,7 @@ test("init", function() {
 	ok(true, 'arbitrary method called after init');
 
 	el = $("<div></div>").selectable();
-	var foo = el.selectable("option", "foo");
+	el.selectable("option", "foo");
 	el.remove();
 	ok(true, 'arbitrary option getter after init');
 
diff --git a/tests/unit/selectable/selectable_options.js b/tests/unit/selectable/selectable_options.js
index be9fdf5fe..ad57000a9 100644
--- a/tests/unit/selectable/selectable_options.js
+++ b/tests/unit/selectable/selectable_options.js
@@ -13,7 +13,7 @@ test("autoRefresh", function() {
 	actual = 0;
 	el = $("#selectable1").selectable({ autoRefresh: false,	selected: selected });
 	sel.hide();
-	drag(1000, 1000);
+	TestHelpers.selectableDrag(1000, 1000);
 	equal(actual, sel.length);
 	el.selectable("destroy");
 
@@ -21,10 +21,10 @@ test("autoRefresh", function() {
 	sel.show();
 	el = $("#selectable1").selectable({ autoRefresh: true,	selected: selected });
 	sel.hide();
-	drag(1000, 1000);
+	TestHelpers.selectableDrag(1000, 1000);
 	equal(actual, 0);
 	sel.show();
-	drag(1000, 1000);
+	TestHelpers.selectableDrag(1000, 1000);
 	equal(actual, sel.length);
 	el.selectable("destroy");
 	sel.show();
@@ -37,7 +37,7 @@ test("filter", function() {
 
 	actual = 0;
 	el = $("#selectable1").selectable({ filter: '.special', selected: selected });
-	drag(1000, 1000);
+	TestHelpers.selectableDrag(1000, 1000);
 	ok(sel.length !== 1, "this test assumes more than 1 selectee");
 	equal(actual, 1);
 	el.selectable("destroy");