llvm-remove: Remove "using namespace" in header.

llvm-svn: 371563
diff --git a/llvm/tools/llvm-reduce/deltas/Delta.cpp b/llvm/tools/llvm-reduce/deltas/Delta.cpp
index 68a9272..c6c39d9 100644
--- a/llvm/tools/llvm-reduce/deltas/Delta.cpp
+++ b/llvm/tools/llvm-reduce/deltas/Delta.cpp
@@ -15,6 +15,8 @@
 #include "Delta.h"
 #include "llvm/ADT/STLExtras.h"
 
+using namespace llvm;
+
 /// Writes IR code to the given Filepath
 static bool writeProgramToFile(StringRef Filepath, int FD, const Module &M) {
   ToolOutputFile Out(Filepath, FD);
@@ -165,4 +167,4 @@
   if (ReducedProgram)
     Test.setProgram(std::move(ReducedProgram));
   errs() << "Couldn't increase anymore.\n";
-}
\ No newline at end of file
+}