Remove unnecessary this reference

Author: AdityaHirapara

lib/LocalBinary.js

@@ -12,17 +12,16 @@ function LocalBinary(){
   this.is64bits = process.arch == 'x64';
 
   this.getDownloadPath = function () {
-    var that = this;
-    if(that.hostOS.match(/darwin|mac os/i)){
+    if(this.hostOS.match(/darwin|mac os/i)){
       return 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal-darwin-x64';
-    } else if(that.hostOS.match(/mswin|msys|mingw|cygwin|bccwin|wince|emc|win32/i)) {
-      that.windows = true;
+    } else if(this.hostOS.match(/mswin|msys|mingw|cygwin|bccwin|wince|emc|win32/i)) {
+      this.windows = true;
       return 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal.exe';
     } else {
-      if(that.isAlpine()) {
+      if(this.isAlpine()) {
         return 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal-alpine';
       } else {
-        if(that.is64bits)
+        if(this.is64bits)
           return 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal-linux-x64';
         else
           return 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal-linux-ia32';