remove support for glReadPixels screenshot path

this was only needed on some chipset we're not
supporting in KLP.

Change-Id: I2e8fc07f135030bd61d2e241a8e426f1a4316425
diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index 6442a86..a9217ca 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -105,8 +105,7 @@
     virtual status_t captureScreen(const sp<IBinder>& display,
             const sp<IGraphicBufferProducer>& producer,
             uint32_t reqWidth, uint32_t reqHeight,
-            uint32_t minLayerZ, uint32_t maxLayerZ,
-            bool isCpuConsumer)
+            uint32_t minLayerZ, uint32_t maxLayerZ)
     {
         Parcel data, reply;
         data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
@@ -116,7 +115,6 @@
         data.writeInt32(reqHeight);
         data.writeInt32(minLayerZ);
         data.writeInt32(maxLayerZ);
-        data.writeInt32(isCpuConsumer);
         remote()->transact(BnSurfaceComposer::CAPTURE_SCREEN, data, &reply);
         return reply.readInt32();
     }
@@ -275,10 +273,8 @@
             uint32_t reqHeight = data.readInt32();
             uint32_t minLayerZ = data.readInt32();
             uint32_t maxLayerZ = data.readInt32();
-            bool isCpuConsumer = data.readInt32();
             status_t res = captureScreen(display, producer,
-                    reqWidth, reqHeight, minLayerZ, maxLayerZ,
-                    isCpuConsumer);
+                    reqWidth, reqHeight, minLayerZ, maxLayerZ);
             reply->writeInt32(res);
         } break;
         case AUTHENTICATE_SURFACE: {