kernel: remove 78 old patch symlinks (path= local fork model)

The old patch symlinks (P0-*.patch through P17-*.patch, redox.patch,
redbear-consolidated.patch) were leftover from the git+patches model.
With path = "../../../local/sources/kernel", the cookbook creates a
symlink to the local fork and does NOT apply any patches. The patches
are preserved in local/patches/kernel/ for reference only.

recipes/core/kernel/P0-canary.patch

@@ -1 +0,0 @@
-../../../local/patches/kernel/P0-canary.patch

recipes/core/kernel/P1-memory-map-overflow.patch

@@ -1 +0,0 @@
-../../../local/patches/kernel/P1-memory-map-overflow.patch

recipes/core/kernel/redbear-consolidated.patch

@@ -1 +0,0 @@
-../../../local/patches/kernel/redbear-consolidated.patch

recipes/core/kernel/redox.patch

@@ -1 +0,0 @@
-../../../local/patches/kernel/redox.patch