Removed an obsolete unicode-math key.

style/mu/base.dtx

@@ -236,8 +236,7 @@
     \thesis@require{fontspec}
     \thesis@require{unicode-math}
     \setmainfont[Ligatures=TeX]{TeX Gyre Pagella}
-    \setmathfont[math-style=ISO,bold-style=ISO,vargreek-shape=TeX]%
-      {texgyrepagella-math.otf}
+    \setmathfont[math-style=ISO,bold-style=ISO]{texgyrepagella-math.otf}
   \fi
 %    \end{macrocode}
 % The following packages get only loaded, when the document is not