specfile: 'rm -f $RPM_BUILD_ROOT' in %install and %clean sections removed

See 'Tags and Sections' for more info:
  https://fedoraproject.org/wiki/Packaging:Guidelines#Tags_and_Sections

tcsh.spec

@@ -114,7 +114,6 @@ make %{?_smp_mflags} -C nls catalogs
 
 
 %install
-rm -rf ${RPM_BUILD_ROOT}
 mkdir -p ${RPM_BUILD_ROOT}%{_mandir}/man1 ${RPM_BUILD_ROOT}%{_bindir}
 install -p -m 755 tcsh     ${RPM_BUILD_ROOT}%{_bindir}/tcsh
 install -p -m 644 tcsh.man ${RPM_BUILD_ROOT}%{_mandir}/man1/tcsh.1
@@ -148,10 +147,6 @@ _EOF
 make check
 
 
-%clean
-rm -rf $RPM_BUILD_ROOT
-
-
 %post
 if [ ! -f /etc/shells ]; then
   echo "%{_bindir}/tcsh" >> /etc/shells