Use default university logo sizes

style/mu/base.dtx

@@ -748,7 +748,7 @@
       \colorlet{thesis@color@secondary}{black}%
       \thispagestyle{empty}%
       \begin{center}%
-        \thesis@blocks@universityLogo@monochrome[width=6.3cm]%
+        \thesis@blocks@universityLogo@monochrome
         \par\vspace{0.75cm}%
         {\sf\thesis@titlePage@large\thesis@@upper{facultyName}}%
         \par\vfill
@@ -845,7 +845,7 @@
   \begin{alwayssingle}%
     \thispagestyle{empty}%
     \begin{center}%
-      \thesis@blocks@universityLogo@color[width=6.3cm]%
+      \thesis@blocks@universityLogo@color
       \par\vspace{0.75cm}%
       {\sf\thesis@titlePage@large\thesis@@upper{facultyName}}%
       \par\vspace{1.75cm}%