cmd/compile: remove empty branches

Change-Id: Id87d9f55d1714fc553f5b1a9cba0f2fe348dad3e
Reviewed-on: https://go-review.googlesource.com/126396
Run-TryBot: Yury Smolsky <yury@smolsky.by>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/internal/ssa/debug.go

@@ -535,8 +535,6 @@ func (state *debugState) mergePredecessors(b *Block, blockLocs []*BlockDebug) ([
 	}
 
 	if len(preds) == 0 {
-		if state.loggingEnabled {
-		}
 		state.currentState.reset(nil)
 		return nil, true
 	}
@@ -854,7 +852,6 @@ func (state *debugState) buildLocationLists(blockLocs []*BlockDebug) {
 			}
 			state.changedVars.clear()
 		}
-
 	}
 
 	if state.loggingEnabled {
@@ -914,8 +911,6 @@ func (state *debugState) updateVar(varID VarID, v *Value, curLoc []VarLoc) {
 	for i, slot := range state.varSlots[varID] {
 		pending.pieces[i] = curLoc[slot]
 	}
-	return
-
 }
 
 // writePendingEntry writes out the pending entry for varID, if any,

src/cmd/compile/internal/ssa/redblack32_test.go

@@ -175,8 +175,6 @@ func allRBT32Ops(te *testing.T, x []int32) {
 		if s != "" {
 			te.Errorf("Tree consistency problem at %v", s)
 			return
-		} else {
-			// fmt.Printf("%s", t.DebugString())
 		}
 	}