Revert "Create symlinks for the small-letter application icon file names"

This reverts commit 328f82297a19a8def02773d0ad9386b8a38887da.

admin/linux/debian/debian/rules

@@ -10,6 +10,3 @@ DEB_SHLIBDEPS_INCLUDE=$(CURDIR)/$(DEB_BUILDDIR)/csync/src
 
 DEB_SRCDIR=.
 DEB_CMAKE_EXTRA_FLAGS = -DCMAKE_SKIP_RPATH=OFF -DCMAKE_SKIP_BUILD_RPATH=ON -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON
-
-common-install-impl::
-	for i in `find $(DEB_DESTDIR)/usr/share/icons -name Nextcloud.png`; do dname=`dirname $$i`; ln -sf Nextcloud.png "$${dname}/nextcloud.png"; done