How to remove outer triangle?

I’m new to using MMG2D.
The results of mmg2d and cdt are different. I’m not sure how to delete the outer triangle

here is input mesh.
I don’t know why the edge line is not perfect with Medit viewer.

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(sorry, I can’t attach file)
MeshVersionFormatted 2
Dimension 2
Vertices
95
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0.26291196 0.39019645
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0.11818326 0.40414870
0.08260139 0.37538306
0.05361811 0.34207291
0.02510484 0.30843907
0.00000000 0.27304858
0.01116075 0.23446584
0.05253742 0.21147779
0.08739790 0.18215957
0.13184782 0.16365548
0.17678370 0.14569794
0.20997123 0.11555512
0.23487661 0.08013357
0.27428417 0.05577003
0.30609623 0.02448313
0.34462248 0.00000000
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0.40368105 1.00000000
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0.47030304 0.49222005
0.47073181 0.45153024
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0.40728793 0.39400451

Edges
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End