Remove duplicated dex2oat usage message

Because '--huge-method-max' usage message is duplicated,
Remove duplicated dex2oat usage message.

Change-Id: I91cef8319d7292e4977eba49dfcb8cc2cd9ac1bf
diff --git a/dex2oat/dex2oat.cc b/dex2oat/dex2oat.cc
index df7bb57..25be599 100644
--- a/dex2oat/dex2oat.cc
+++ b/dex2oat/dex2oat.cc
@@ -182,11 +182,6 @@
   UsageError("      Example: --compiler-filter=everything");
   UsageError("      Default: speed");
   UsageError("");
-  UsageError("  --huge-method-max=<method-instruction-count>: the threshold size for a huge");
-  UsageError("      method for compiler filter tuning.");
-  UsageError("      Example: --huge-method-max=%d", CompilerOptions::kDefaultHugeMethodThreshold);
-  UsageError("      Default: %d", CompilerOptions::kDefaultHugeMethodThreshold);
-  UsageError("");
   UsageError("  --huge-method-max=<method-instruction-count>: threshold size for a huge");
   UsageError("      method for compiler filter tuning.");
   UsageError("      Example: --huge-method-max=%d", CompilerOptions::kDefaultHugeMethodThreshold);