remove remaining Vim modeline comments

remove remaining Vim modeline comments

These have no effect in non-Vim editors or for Vim users that have modeline
disabled. A more modern way to achieve this is clang-format. This commit was
achieved with

  $ find . -type f \( -iname "*.cs" -or -iname "*.y" -or -iname "*.l" -or \
    -iname "*.m" -or -iname "*.c" -or -iname Makeile.am -or -iname "*.cpp" -or \
    -iname "*.h" \) -exec sed -i '' -e ':a' -e 'N' -e '$!ba' -e \
    's/\/\* vim:set [^\n]*\n\n//g' "{}" \;

and then manually collecting some further ones that were missing by this filter.