recovery: Remove obsolete code that supports "CACHE:foo" format.

The passing of "--update_package=CACHE:foo" format has been removed
in Gingerbread, with commit 4baf641e7d96375eba3f9a3aff5400b9e3d28cd6
in frameworks/base (core/java/android/os/RecoverySystem.java).

Test: Recovery image with --update_package still works.
Change-Id: I37b56ccf98f62cadf2a3975bbc38b16fea6fe9a1
diff --git a/recovery.cpp b/recovery.cpp
index e16f28c..e777c46 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -1525,27 +1525,7 @@
     for (const auto& arg : args) {
         printf(" \"%s\"", arg.c_str());
     }
-    printf("\n");
-
-    if (update_package) {
-        // For backwards compatibility on the cache partition only, if
-        // we're given an old 'root' path "CACHE:foo", change it to
-        // "/cache/foo".
-        if (strncmp(update_package, "CACHE:", 6) == 0) {
-            int len = strlen(update_package) + 10;
-            char* modified_path = (char*)malloc(len);
-            if (modified_path) {
-                strlcpy(modified_path, "/cache/", len);
-                strlcat(modified_path, update_package+6, len);
-                printf("(replacing path \"%s\" with \"%s\")\n",
-                       update_package, modified_path);
-                update_package = modified_path;
-            }
-            else
-                printf("modified_path allocation failed\n");
-        }
-    }
-    printf("\n");
+    printf("\n\n");
 
     property_list(print_property, NULL);
     printf("\n");