Revert "Initial check in of icontext."

This reverts commit 5bbe3cd6bb.

sys/share/pcmain.c

@@ -97,7 +97,9 @@ char *argv[];
 
     nethack_enter(argc, argv);
 
-    icontext_init();
+#ifdef PLAYAGAIN
+    decl_early_init();
+#endif
     sys_early_init();
 
 #if defined(WIN32) && defined(TTY_GRAPHICS)

sys/winnt/stubs.c

@@ -37,7 +37,9 @@ char *argv[];
 {
     boolean resuming;
 
-    icontext_init();
+#ifdef PLAYAGAIN
+    decl_early_init();
+#endif
     sys_early_init();
     Strcpy(default_window_sys, "tty");
     resuming = pcmain(argc, argv);