Delete extra Matlab ignore file (#9479)

options/gitignore/Matlab

@@ -1,31 +0,0 @@
-# Windows default autosave extension
-*.asv
-
-# OSX / *nix default autosave extension
-*.m~
-
-# Compiled MEX binaries (all platforms)
-*.mex*
-
-# Packaged app and toolbox files
-*.mlappinstall
-*.mltbx
-
-# Generated helpsearch folders
-helpsearch*/
-
-# Simulink code generation folders
-slprj/
-sccprj/
-
-# Matlab code generation folders
-codegen/
-
-# Simulink autosave extension
-*.autosave
-
-# Simulink cache files
-*.slxc
-
-# Octave session info
-octave-workspace