Remove unused kMaxDataSize.

PiperOrigin-RevId: 974659406

centipede/runner.cc

diff --git a/centipede/runner.cc b/centipede/runner.cc
index e4d8384..d6e3a9b 100644
--- a/centipede/runner.cc
+++ b/centipede/runner.cc
@@ -329,9 +329,6 @@
   return CentipedeLLVMFuzzerMutateCallback(data, size, max_size);
 }
 
-// An arbitrary large size for input data.
-static const size_t kMaxDataSize = 1 << 20;
-
 static void WriteFeaturesToFile(FILE* file, const feature_t* features,
                                 size_t size) {
   if (!size) return;