Don't allow for error in ProgramImpl::save.

Refactoring cleanup patch only.

BUG=angleproject:1897

Change-Id: I6d12de5dab16ead9684886a1cf15b570e3c98156
Reviewed-on: https://chromium-review.googlesource.com/522871
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/Program.cpp b/src/libANGLE/Program.cpp
index 6d18f2a..e938afb 100644
--- a/src/libANGLE/Program.cpp
+++ b/src/libANGLE/Program.cpp
@@ -1104,7 +1104,7 @@
         stream.writeInt(samplerBinding.boundTextureUnits.size());
     }
 
-    ANGLE_TRY(mProgram->save(&stream));
+    mProgram->save(&stream);
 
     GLsizei streamLength   = static_cast<GLsizei>(stream.length());
     const void *streamState = stream.data();