Remove len < 8 check in longestCommonPrefix

Micro benchmarks look a tiny bit better /shrug

ConflictSet.cpp

@@ -1705,10 +1705,6 @@ int longestCommonPrefix(const uint8_t *ap, const uint8_t *bp, int cl) {
   int i = 0;
   int end;
 
-  if (cl < 8) {
-    goto bytes;
-  }
-
   // kStride * kUnrollCount at a time
   end = cl & ~(kStride * kUnrollFactor - 1);
   while (i < end) {
@@ -1749,7 +1745,6 @@ int longestCommonPrefix(const uint8_t *ap, const uint8_t *bp, int cl) {
     bp += 8;
   }
 
-bytes:
   // byte at a time
   while (i < cl) {
     if (*ap != *bp) {