Removed iOS example Podfile.lock from version control.

Author: matux

rollbar_flutter/example/.gitignore

@@ -15,10 +15,8 @@
 *.iws
 .idea/
 
-# The .vscode folder contains launch configuration and tasks you configure in
-# VS Code which you may wish to be included in version control, so this line
-# is commented out by default.
-#.vscode/
+# Cocoapods
+ios/Podfile.lock
 
 # Flutter/Dart/Pub related
 **/doc/api/