apps: Remove sym and crash

Not necessary anymore.

apps/Makefile

@@ -1,4 +1,4 @@
-APPS := init sym sh crash uname uptime hello ps ls args cat stat su
+APPS := init sh uname uptime hello ps ls args cat stat su
 
 APPS_DIR := $(LUNA_ROOT)/apps
 APPS_SRC := $(APPS_DIR)/src

apps/src/crash.c

@@ -1,5 +0,0 @@
-int main()
-{
-    int* ptr = (int*)0xdeadbeef;
-    *ptr = 6;
-}

apps/src/sym.c

@@ -1,36 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-
-int main()
-{
-    FILE* syms = fopen("/sys/moon.sym", "r");
-    if (!syms)
-    {
-        perror("fopen");
-        return 1;
-    }
-
-    char buf[1200];
-
-    if (fseek(syms, -1199, SEEK_END) < 0)
-    {
-        perror("fseek");
-        return 1;
-    }
-
-    size_t nread = fread(buf, 1199, 1, syms);
-    if (ferror(syms))
-    {
-        perror("fread");
-        return 1;
-    }
-
-    buf[nread] = 0;
-
-    printf("%s\n", strchr(buf, '\n') + 1);
-
-    fclose(syms);
-
-    return 0;
-}