Revert "time: add runtime sanity check"

This reverts commit 3c2e16be22.

src/kernel/checks.cpp

@@ -6,7 +6,6 @@
 
 #include <key.h>
 #include <random.h>
-#include <util/time.h>
 #include <util/translation.h>
 
 #include <memory>
@@ -23,10 +22,6 @@ util::Result<void> SanityChecks(const Context&)
         return util::Error{Untranslated("OS cryptographic RNG sanity check failure. Aborting.")};
     }
 
-    if (!ChronoSanityCheck()) {
-        return util::Error{Untranslated("Clock epoch mismatch. Aborting.")};
-    }
-
     return {};
 }