Deletes unnecessary variables created otherwise

Author: adotg

dist/angular-fusioncharts.min.js

@@ -19,7 +19,6 @@
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE. 
-var counter = 0;
 (function() {
     var fc = angular.module('ng-fusioncharts', []);