Fix warnings about unused variables. Submitted by timeless.

src/compiler/OutputGLSL.cpp

@@ -304,8 +304,6 @@ bool TOutputGLSL::visitBinary(Visit visit, TIntermBinary* node)
 
 bool TOutputGLSL::visitUnary(Visit visit, TIntermUnary* node)
 {
-    TInfoSinkBase& out = objSink();
-
     switch (node->getOp())
     {
         case EOpNegative: writeTriplet(visit, "(-", NULL, ")"); break;
@@ -650,8 +648,6 @@ bool TOutputGLSL::visitLoop(Visit visit, TIntermLoop* node)
 
 bool TOutputGLSL::visitBranch(Visit visit, TIntermBranch* node)
 {
-    TInfoSinkBase &out = objSink();
-
     switch (node->getFlowOp())
     {
         case EOpKill: writeTriplet(visit, "discard", NULL, NULL); break;