Revert "hwc: Perform MDP downscaling for WFD/HDMI Scenario"

This reverts commit 1291675ee44cadc234c4403cf1b0cfe70eadaf3a.
diff --git a/libhwcomposer/hwc_utils.h b/libhwcomposer/hwc_utils.h
index 8809493..251b3cb 100644
--- a/libhwcomposer/hwc_utils.h
+++ b/libhwcomposer/hwc_utils.h
@@ -83,8 +83,6 @@
     // To trigger padding round to clean up mdp
     // pipes
     bool isConfiguring;
-    // External Display is in MDP Downscale mode indicator
-    bool mDownScaleMode;
 };
 
 struct ListStats {
@@ -187,12 +185,8 @@
 
 bool isPrimaryPortrait(hwc_context_t *ctx);
 
-bool isOrientationPortrait(hwc_context_t *ctx);
-
 void calcExtDisplayPosition(hwc_context_t *ctx,
-                               int dpy,
-                               hwc_rect_t& sourceCrop,
-                               hwc_rect_t& displayFrame);
+                               int dpy, hwc_rect_t& displayFrame);
 
 //Close acquireFenceFds of all layers of incoming list
 void closeAcquireFds(hwc_display_contents_1_t* list);