Make newer GCCs happier: Removed unused variables.

Review URL: http://codereview.chromium.org/7969014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9334 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/full-codegen-ia32.cc

@@ -4097,11 +4097,8 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
     default: {
       VisitForAccumulatorValue(expr->right());
       Condition cc = no_condition;
-      bool strict = false;
       switch (op) {
         case Token::EQ_STRICT:
-          strict = true;
-          // Fall through
         case Token::EQ:
           cc = equal;
           __ pop(edx);

src/mips/full-codegen-mips.cc

@@ -4050,11 +4050,8 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
     default: {
       VisitForAccumulatorValue(expr->right());
       Condition cc = eq;
-      bool strict = false;
       switch (op) {
         case Token::EQ_STRICT:
-          strict = true;
-          // Fall through.
         case Token::EQ:
           cc = eq;
           __ mov(a0, result_register());

src/x64/full-codegen-x64.cc

@@ -3972,7 +3972,6 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
       Condition cc = no_condition;
       switch (op) {
         case Token::EQ_STRICT:
-          // Fall through.
         case Token::EQ:
           cc = equal;
           __ pop(rdx);