Remove CrazyFun build file from Ruby bindings
Remove CrazyFun build file from Ruby bindings

The targets are available via Bazel, see the following commits for
more details:
* c6d4516e9cfe59dd0f634b95b7eb42110abfb8e7
* 5a4ce484fa6303b37b7b33fd2fdeeb146455e436

The only missing bit is publishing built gem which for now can be
achieve by running `gem push` manually:

bazel build //rb:selenium-webdriver && gem push bazel-bin/rb/selenium-webdriver.gem
bazel build //rb:selenium-devtools && gem push bazel-bin/rb/selenium-devtools.gem

joshmgrant/selenium,HtmlUnit/selenium,titusfortner/selenium,titusfortner/selenium,joshmgrant/selenium,titusfortner/selenium,valfirst/selenium,valfirst/selenium,joshmgrant/selenium,HtmlUnit/selenium,valfirst/selenium,valfirst/selenium,SeleniumHQ/selenium,SeleniumHQ/selenium,valfirst/selenium,joshmgrant/selenium,valfirst/selenium,valfirst/selenium,titusfortner/selenium,titusfortner/selenium,titusfortner/selenium,SeleniumHQ/selenium,HtmlUnit/selenium,SeleniumHQ/selenium,joshmgrant/selenium,SeleniumHQ/selenium,HtmlUnit/selenium,valfirst/selenium,HtmlUnit/selenium,titusfortner/selenium,joshmgrant/selenium,HtmlUnit/selenium,joshmgrant/selenium,titusfortner/selenium,HtmlUnit/selenium,valfirst/selenium,SeleniumHQ/selenium,valfirst/selenium,SeleniumHQ/selenium,joshmgrant/selenium,HtmlUnit/selenium,valfirst/selenium,titusfortner/selenium,joshmgrant/selenium,titusfortner/selenium,SeleniumHQ/selenium,HtmlUnit/selenium,joshmgrant/selenium,titusfortner/selenium,SeleniumHQ/selenium,HtmlUnit/selenium,SeleniumHQ/selenium,joshmgrant/selenium,SeleniumHQ/selenium