tasks: kernel: Kill unexisting wiki reference

Change-Id: Ib43012206ba7028072d39495bda32d82dd72bdc6
diff --git a/build/tasks/kernel.mk b/build/tasks/kernel.mk
index 0d30589..dc7735e 100644
--- a/build/tasks/kernel.mk
+++ b/build/tasks/kernel.mk
@@ -161,7 +161,6 @@
         $(warning * THIS IS DEPRECATED, AND WILL BE DISCONTINUED                *)
         $(warning * Please configure your device to download the kernel         *)
         $(warning * source repository to $(KERNEL_SRC))
-        $(warning * See http://wiki.lineageos.org/w/Doc:_integrated_kernel_building)
         $(warning * for more information                                        *)
         $(warning ***************************************************************)
         FULL_KERNEL_BUILD := false