Remove references to ChromeShell in docs.

docs/chromoting_android_hacking.md

 # Chromoting Android Hacking
 
 This guide, which is meant to accompany the
 [compilation guide](chromoting_build_instructions.md), explains the process of
 viewing the logs and debugging the CRD Android client. I'll assume you've
 already built the APK as described in the aforementioned guide, that you're in
 the `src/` directory, and that your binary is at
 `out/Release/apks/Chromoting.apk`. Additionally, you should have installed the
 app on at least one (still) connected device.
 
@@ skipping 47 matching lines @@
 <classpathentry kind="src" path="components/dom_distiller/android/java/src"/>
 <classpathentry kind="src" path="components/navigation_interception/android/java/src"/>
 <classpathentry kind="src" path="ui/android/java/src"/>
 <classpathentry kind="src" path="media/base/android/java/src"/>
 <classpathentry kind="src" path="chrome/test/android/unit_tests_apk/src"/>
 <classpathentry kind="src" path="chrome/test/android/javatests/src"/>
 <classpathentry kind="src" path="chrome/test/chromedriver/test/webview_shell/java/src"/>
 <classpathentry kind="src" path="chrome/common/extensions/docs/examples/extensions/irc/servlet/src"/>
 <classpathentry kind="src" path="chrome/android/java/src"/>
 <classpathentry kind="src" path="chrome/android/uiautomator_tests/src"/>
-<classpathentry kind="src" path="chrome/android/shell/java/src"/>
-<classpathentry kind="src" path="chrome/android/shell/javatests/src"/>
 <classpathentry kind="src" path="chrome/android/javatests/src"/>
 <classpathentry kind="src" path="sync/test/android/javatests/src"/>
 <classpathentry kind="src" path="sync/android/java/src"/>
 <classpathentry kind="src" path="sync/android/javatests/src"/>
 <classpathentry kind="src" path="mojo/public/java/src"/>
 <classpathentry kind="src" path="mojo/android/system/src"/>
 <classpathentry kind="src" path="mojo/android/javatests/src"/>
 <classpathentry kind="src" path="mojo/shell/android/apk/src"/>
 <classpathentry kind="src" path="mojo/services/native_viewport/android/src"/>
 <classpathentry kind="src" path="testing/android/java/src"/>
@@ skipping 72 matching lines @@
 to easily launch GDB. Run
 
 ```shell
 $ build/android/adb_gdb --package-name=org.chromium.chromoting \
 --activity=.Chromoting --start
 ```
 
 Note that if you have multiple devices connected, you must export
 `ANDROID_SERIAL` to select one; set it to the serial number of the desired
 device as output by `$ adb devices`.