Drop prebuilt aidl as of build 515235 in master.

The binaries are extracted from the sdk-repo-*-platform-tools-*.zip.

Change-Id: I1b052713f11bdb2a1988cd3a23efd5ab6fa3fcb8
diff --git a/tools/darwin/aidl b/tools/darwin/aidl
index 3fdadd6..650444e 100755
--- a/tools/darwin/aidl
+++ b/tools/darwin/aidl
Binary files differ
diff --git a/tools/linux/aidl b/tools/linux/aidl
index 746e25d..7a1c0e4 100755
--- a/tools/linux/aidl
+++ b/tools/linux/aidl
Binary files differ