get rid of forceQuitInstruments (fix #2901)

lib/server/parser.js

@@ -191,16 +191,6 @@ var args = [
   , nargs: 0
   }],
 
-  [['--force-quit-instruments', '-fqi'], {
-    defaultValue: false
-  , dest: 'forceQuitInstruments'
-  , action: 'storeTrue'
-  , required: false
-  , help: "Run the watcher process that will force-kill an " +
-          "unresponsive instruments"
-  , nargs: 0
-  }],
-
   [['--app-pkg'], {
     dest: 'androidPackage'
   , defaultValue: null