Delete GrTextContext

TBR=bsalomon@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1699073004

Review URL: https://codereview.chromium.org/1699073004
diff --git a/src/gpu/text/GrAtlasTextBlob.cpp b/src/gpu/text/GrAtlasTextBlob.cpp
index 2775098..f2ca3d2 100644
--- a/src/gpu/text/GrAtlasTextBlob.cpp
+++ b/src/gpu/text/GrAtlasTextBlob.cpp
@@ -366,7 +366,7 @@
         return;
     }
 
-    runPaint.setFlags(GrTextContext::FilterTextFlags(props, runPaint));
+    runPaint.setFlags(GrTextUtils::FilterTextFlags(props, runPaint));
 
     switch (it.positioning()) {
         case SkTextBlob::kDefault_Positioning: