Make max number of vertex attributes be checked dynamically

src/gpu/gl/GrGLCaps.h

Index: src/gpu/gl/GrGLCaps.h
diff --git a/src/gpu/gl/GrGLCaps.h b/src/gpu/gl/GrGLCaps.h
index ed673e7ce73cd507a1cc96d5545431bd5029a322..bb3e2317196eb8a22f21b2103ca667faf408a4b9 100644
--- a/src/gpu/gl/GrGLCaps.h
+++ b/src/gpu/gl/GrGLCaps.h
@@ -248,9 +248,6 @@ public:
     /// The maximum number of fragment uniform vectors (GLES has min. 16).
     int maxFragmentUniformVectors() const { return fMaxFragmentUniformVectors; }
 
-    /// maximum number of attribute values per vertex
-    int maxVertexAttributes() const { return fMaxVertexAttributes; }
-
     /**
      * Depending on the ES extensions present the BGRA external format may
      * correspond to either a BGRA or RGBA internalFormat. On desktop GL it is
@@ -381,7 +378,6 @@ private:
     SkTArray<StencilFormat, true> fStencilFormats;
 
     int fMaxFragmentUniformVectors;
-    int fMaxVertexAttributes;
 
     MSFBOType           fMSFBOType;
     InvalidateFBType    fInvalidateFBType;