GUI: Remove unused variables

For build-system CFLAGS clean-up, remove unused variables.

Bug: 18632512
Change-Id: I79fdcf830683d7278f4bf114cfb76a26da1b88ff
diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index f1d2e91..aa4aee4 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -96,8 +96,8 @@
 void Surface::allocateBuffers() {
     uint32_t reqWidth = mReqWidth ? mReqWidth : mUserWidth;
     uint32_t reqHeight = mReqHeight ? mReqHeight : mUserHeight;
-    mGraphicBufferProducer->allocateBuffers(mSwapIntervalZero, mReqWidth,
-            mReqHeight, mReqFormat, mReqUsage);
+    mGraphicBufferProducer->allocateBuffers(mSwapIntervalZero, reqWidth,
+            reqHeight, mReqFormat, mReqUsage);
 }
 
 int Surface::hook_setSwapInterval(ANativeWindow* window, int interval) {
@@ -274,7 +274,6 @@
 
 int Surface::getSlotFromBufferLocked(
         android_native_buffer_t* buffer) const {
-    bool dumpedState = false;
     for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
         if (mSlots[i].buffer != NULL &&
                 mSlots[i].buffer->handle == buffer->handle) {