Return colour theme declaration to style file

beamerthemem.sty

@@ -56,6 +56,8 @@
 \usetikzlibrary{backgrounds}
 \usetikzlibrary{calc}
 
+\usecolortheme{metropolis}
+
 %}}}
 %{{{ --- Titlepage --------------------
 
@@ -251,7 +253,7 @@
   \if@useTotalSlideIndicator%
   \insertpagenumber/\insertpresentationendpage%
   \else%
-  \insertpagenumber%  
+  \insertpagenumber%
   \fi%
 \end{beamercolorbox}%
 }

demo.tex

@@ -1,7 +1,6 @@
 \documentclass[10pt, compress]{beamer}
 
 \usetheme{m}
-\usecolortheme{metropolis}
 \usefonttheme{metropolis}
 
 \usepackage{booktabs}