Clean up unused constant globals

sandbox/linux/seccomp-bpf/sandbox_bpf_unittest.cc

Index: sandbox/linux/seccomp-bpf/sandbox_bpf_unittest.cc
diff --git a/sandbox/linux/seccomp-bpf/sandbox_bpf_unittest.cc b/sandbox/linux/seccomp-bpf/sandbox_bpf_unittest.cc
index ea138dfa9a3c3d433d98aac1697af1742af4f701..1e3ce66bd75faf3ad8e3e2c21aa251da003a6eef 100644
--- a/sandbox/linux/seccomp-bpf/sandbox_bpf_unittest.cc
+++ b/sandbox/linux/seccomp-bpf/sandbox_bpf_unittest.cc
@@ -1110,7 +1110,6 @@ class EqualityStressTest {
   // Don't increase these values. We are pushing the limits of the maximum
   // BPF program that the kernel will allow us to load. If the values are
   // increased too much, the test will start failing.
-  static const int kNumIterations = 3;
   static const int kNumTestCases = 40;
   static const int kMaxFanOut = 3;
   static const int kMaxArgs = 6;