Remove mkbootimg from the pathmap.

It's only ever referred to directly. (Should probably move to
system/core/include, but that's orthogonal to this change.)

Change-Id: I353afff031a29206aaa5a0991fe0ccb39e4731e2
diff --git a/core/pathmap.mk b/core/pathmap.mk
index d9f2a01..38306f4 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -43,7 +43,6 @@
     libnativehelper:libnativehelper/include \
     libpagemap:system/extras/libpagemap/include \
     libril:hardware/ril/include \
-    mkbootimg:system/core/mkbootimg \
     opengl-tests-includes:frameworks/native/opengl/tests/include \
     recovery:bootable/recovery \
     system-core:system/core/include \