Clean up redundant new line in the GPUSurfaceGLSkia constructor initializer list (#169031)

Clean up redundant new line in the `GPUSurfaceGLSkia` constructor
initializer list

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Co-authored-by: Jonah Williams <jonahwilliams@google.com>

engine/src/flutter/shell/gpu/gpu_surface_gl_skia.cc

@@ -76,7 +76,6 @@ GPUSurfaceGLSkia::GPUSurfaceGLSkia(const sk_sp<GrDirectContext>& gr_context,
                                    bool render_to_surface)
     : delegate_(delegate),
       context_(gr_context),
-
       render_to_surface_(render_to_surface),
       weak_factory_(this) {
   auto context_switch = delegate_->GLContextMakeCurrent();