Revert "Workaround mismatch between bionic and device kernel headers"

This reverts commit 4a61e5fde9b74cabeacffac05da93847ad9bbce8.
diff --git a/server/RouteController.cpp b/server/RouteController.cpp
index fd30fe8..a6fa3a2 100644
--- a/server/RouteController.cpp
+++ b/server/RouteController.cpp
@@ -86,9 +86,9 @@
 // that will warn us if upstream has given these values some other meaning.
 const uint16_t FRA_UID_START = 18;
 const uint16_t FRA_UID_END   = 19;
-// static_assert(FRA_UID_START > FRA_MAX,
-//              "Android-specific FRA_UID_{START,END} values also assigned in Linux uapi. "
-//              "Check that these values match what the kernel does and then update this assertion.");
+static_assert(FRA_UID_START > FRA_MAX,
+             "Android-specific FRA_UID_{START,END} values also assigned in Linux uapi. "
+             "Check that these values match what the kernel does and then update this assertion.");
 
 // None of our regular routes specify priority, which causes them to have the default priority.
 // For default throw routes, we use a fixed priority of 100000.