Revert of Modifying TextBlobCacheTest to use SkRandomScalerContext

src/gpu/GrBatchFontCache.cpp

Index: src/gpu/GrBatchFontCache.cpp
diff --git a/src/gpu/GrBatchFontCache.cpp b/src/gpu/GrBatchFontCache.cpp
index 5397893296cd98848880da936e0404a6a6d5e99e..dc5b43a54736759b2b325d8d7eccd45f40660239 100644
--- a/src/gpu/GrBatchFontCache.cpp
+++ b/src/gpu/GrBatchFontCache.cpp
@@ -227,7 +227,6 @@
                                                glyph->width(), glyph->height(),
                                                storage.get(), &glyph->fAtlasLocation);
     if (success) {
-        SkASSERT(GrBatchAtlas::kInvalidAtlasID != glyph->fID);
         fAtlasedGlyphs++;
     }
     return success;