remove unused references to ISurface

Change-Id: Ia11c5f46f38c0b00ca63d19d3484bf4024cdb75d
diff --git a/libvideoeditor/lvpp/PreviewPlayer.cpp b/libvideoeditor/lvpp/PreviewPlayer.cpp
index 8618221..2064004 100755
--- a/libvideoeditor/lvpp/PreviewPlayer.cpp
+++ b/libvideoeditor/lvpp/PreviewPlayer.cpp
@@ -757,7 +757,7 @@
 
 
 status_t PreviewPlayer::initRenderer_l() {
-    if (mSurface != NULL || mISurface != NULL) {
+    if (mSurface != NULL) {
         sp<MetaData> meta = mVideoSource->getFormat();
 
         int32_t format;
@@ -796,12 +796,6 @@
 }
 
 
-void PreviewPlayer::setISurface(const sp<ISurface> &isurface) {
-    Mutex::Autolock autoLock(mLock);
-    mISurface = isurface;
-}
-
-
 status_t PreviewPlayer::seekTo(int64_t timeUs) {
 
     if ((mExtractorFlags & MediaExtractor::CAN_SEEK) || (mIsVideoSourceJpg)) {
@@ -1539,7 +1533,7 @@
 
     mFlags = state->mFlags & (AUTO_LOOPING | LOOPING | AT_EOS);
 
-    if (state->mLastVideoFrame && (mSurface != NULL || mISurface != NULL)) {
+    if (state->mLastVideoFrame && (mSurface != NULL)) {
         mVideoRenderer =
             PreviewLocalRenderer::initPreviewLocalRenderer(
                     true,  // previewOnly