Remove unused functions from GrGLVertexBuffer / IndexBuffer

src/gpu/gl/GrGLIndexBuffer.h

Index: src/gpu/gl/GrGLIndexBuffer.h
diff --git a/src/gpu/gl/GrGLIndexBuffer.h b/src/gpu/gl/GrGLIndexBuffer.h
index 62abb0c343ff3133d655af9e898fcc4d0b564cf4..628970a0fa4d1089581af2b787b8a21ba1ef4275 100644
--- a/src/gpu/gl/GrGLIndexBuffer.h
+++ b/src/gpu/gl/GrGLIndexBuffer.h
@@ -24,12 +24,6 @@ public:
     GrGLuint bufferID() const { return fImpl.bufferID(); }
     size_t baseOffset() const { return fImpl.baseOffset(); }
 
-    void bind() const {
-        if (!this->wasDestroyed()) {
-            fImpl.bind(this->getGpuGL());
-        }
-    }
-
 protected:
     void onAbandon() override;
     void onRelease() override;