Don't mention a command line option in an error.

The program using this code may not have it.

Patch by Wilfred Hughes.

llvm-svn: 259106
diff --git a/llvm/lib/Support/TargetRegistry.cpp b/llvm/lib/Support/TargetRegistry.cpp
index eefef8a..02a6d33 100644
--- a/llvm/lib/Support/TargetRegistry.cpp
+++ b/llvm/lib/Support/TargetRegistry.cpp
@@ -73,8 +73,7 @@
   auto I = std::find_if(targets().begin(), targets().end(), ArchMatch);
 
   if (I == targets().end()) {
-    Error = "No available targets are compatible with this triple, "
-      "see -version for the available targets.";
+    Error = "No available targets are compatible with this triple.";
     return nullptr;
   }