Clean up warning text.  Remove extraneous prefix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155015 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 665a5f1..5e6f6b6 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -2485,7 +2485,7 @@
     // entry is redundant.
     if (MayStore)
       PrintWarning(Inst.TheDef->getLoc(),
-                   Twine("Warning: mayStore flag explicitly set on ") +
+                   Twine("mayStore flag explicitly set on ") +
                    "instruction, but flag already inferred from pattern.\n");
     MayStore = true;
   }
@@ -2495,7 +2495,7 @@
     // entry is redundant.
     if (MayLoad)
       PrintWarning(Inst.TheDef->getLoc(),
-                   Twine("Warning: mayLoad flag explicitly set on ") +
+                   Twine("mayLoad flag explicitly set on ") +
                    "instruction, but flag already inferred from pattern.\n");
     MayLoad = true;
   }
@@ -2503,7 +2503,7 @@
   if (Inst.neverHasSideEffects) {
     if (HadPattern)
       PrintWarning(Inst.TheDef->getLoc(),
-                   Twine("Warning: neverHasSideEffects flag explicitly set on ") +
+                   Twine("neverHasSideEffects flag explicitly set on ") +
                    "instruction, but flag already inferred from pattern.\n");
     HasSideEffects = false;
   }
@@ -2511,7 +2511,7 @@
   if (Inst.hasSideEffects) {
     if (HasSideEffects)
       PrintWarning(Inst.TheDef->getLoc(),
-                   Twine("Warning: hasSideEffects flag explicitly set on ") +
+                   Twine("hasSideEffects flag explicitly set on ") +
                    "instruction, but flag already inferred from pattern.\n");
     HasSideEffects = true;
   }