KeyBindings: remove /keyset & "bindbuildtype"

* /keyset was redundant
* KeyAutoBinder was unfinished, undocumented, broken -> dead code -> remove

doc/uikeys.txt

@@ -40,13 +40,6 @@
 //    - the <keycode> can be a currently recognized keysym
 //      (ex:  "keysym menu 0x13F"  or  "keysym radar r")
 //
-//    keyset <name> <keyset>
-//    ----------------------
-//    - specifies a named keyset
-//    - name must start with a letter, and only contain letters, numbers, and '_'
-//    - named keysets may be accessed by prepending the '&' character to the name
-//      (ex:  "keyset myKeySet Ctrl+x"  then  "bind &myKeySet myAction" )
-//
 //    fakemeta <keysym>
 //    -----------------
 //    - assign an auxiliary key for the Meta modifier ("space" is a good choice)
@@ -88,15 +81,11 @@
 //      bind          C+a  fake_action
 //      bind Ctrl+Shift+a  fake_action
 //      bind          *+a  fake_action
-//      bind   &my_keyset  fake_action
 //
 //    The format then goes like this:
 //
 //      [<Modifier>+]...[<Modifier>+]<keysym>
 //
-//        or
-//
-//      &<keyset_name>    (for named keysets)
 //
 //    The modifiers (and their abbreviations), are:
 //

rts/Game/CMakeLists.txt

@@ -55,7 +55,6 @@ SET(sources_engine_Game
 		"${CMAKE_CURRENT_SOURCE_DIR}/UI/HwMouseCursor.cpp"
 		"${CMAKE_CURRENT_SOURCE_DIR}/UI/InfoConsole.cpp"
 		"${CMAKE_CURRENT_SOURCE_DIR}/UI/InputReceiver.cpp"
-		"${CMAKE_CURRENT_SOURCE_DIR}/UI/KeyAutoBinder.cpp"
 		"${CMAKE_CURRENT_SOURCE_DIR}/UI/KeyBindings.cpp"
 		"${CMAKE_CURRENT_SOURCE_DIR}/UI/KeyCodes.cpp"
 		"${CMAKE_CURRENT_SOURCE_DIR}/UI/KeySet.cpp"