Change *.mt patterns to single *.mtc[0-9]*

TeX.gitignore

@@ -123,9 +123,7 @@ acs-*.bib
 *.maf
 *.mlf
 *.mlt
-*.mtc
-*.mtc[0-9]
-*.mtc[1-9][0-9]
+*.mtc[0-9]*
 
 # minted
 _minted*