Nuke COMPILE_FOR_R5.

Not used in $long_time, almost certainly broken, so it's just cruft.

headers/build/os/drivers/Select.h

@@ -31,11 +31,7 @@ enum select_events {
 extern "C" {
 #endif
 
-#ifdef COMPILE_FOR_R5
-extern void notify_select_event(struct selectsync *sync, uint32 ref);
-#else
 extern status_t notify_select_event(struct selectsync *sync, uint32 ref, uint8 event);
-#endif
 
 #ifdef __cplusplus
 }

headers/os/interface/InterfaceDefs.h

@@ -27,11 +27,9 @@ class BRect;
 #define B_UTF8_TRADEMARK	"\xE2\x84\xA2"
 #define B_UTF8_SMILING_FACE	"\xE2\x98\xBB"
 #define B_UTF8_HIROSHI		"\xE5\xBC\x98"
-#ifdef COMPILE_FOR_R5
+
-	#define B_MAX_MOUSE_BUTTONS 3
+
-#else
+#define B_MAX_MOUSE_BUTTONS 16
-	#define B_MAX_MOUSE_BUTTONS 16
-#endif
 
 
 // Key definitions

src/tests/add-ons/kernel/file_systems/fs_shell/kernel.c

@@ -3612,16 +3612,8 @@ send_notification(port_id port, long token, ulong what, long op, nspace_id nsida
 #endif
 }
 
-#ifdef COMPILE_FOR_R5
-void
-notify_select_event(selectsync *sync, uint32 ref)
-{
-}
-#else
 status_t
 notify_select_event(selectsync *sync, uint32 ref, uint8 event)
 {
 	return FS_UNSUPPORTED;
 }
-#endif
-

src/tests/servers/input/inputdevice/Jamfile

@@ -1,9 +1,5 @@
 SubDir HAIKU_TOP src tests servers input inputdevice ;
 
-if $(COMPILE_FOR_R5) {
-	SubDirC++Flags -DCOMPILE_FOR_R5 ;
-}
-
 UsePrivateHeaders input ;
 
 SimpleTest input_device_test :

src/tests/servers/input/prefs/Jamfile

@@ -7,10 +7,6 @@ UsePrivateHeaders [ FDirName servers app ] ;
 
 AddResources KeymapTest : Keymap.rdef ;
 
-if $(COMPILE_FOR_R5) {
-	SubDirC++Flags -DCOMPILE_FOR_R5 ;
-}
-
 SimpleTest KeymapTest :
 	KeymapApplication.cpp
 	KeymapWindow.cpp

src/tests/servers/input/replicant/Jamfile

@@ -4,10 +4,6 @@ UseHeaders [ FDirName $(HAIKU_TOP) src servers input ] ;
 UsePrivateHeaders input ;
 AddResources ReplicantTest : replicant.rdef ;
 
-if $(COMPILE_FOR_R5) {
-	SubDirC++Flags -DCOMPILE_FOR_R5 ;
-}
-
 SimpleTest ReplicantTest :
 	MethodReplicant.cpp
 	MethodMenuItem.cpp