eric4: obsolete port

eric4 is replaced by py-eric-ide, which now supports different Python
versions and Qt4/Qt5. For the purpose of upgrading from eric4, the
replacement is set to py37-eric-ide using the default Qt5.

devel/eric4/Portfile

@@ -1,56 +1,13 @@
 # -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:filetype=tcl:et:sw=4:ts=4:sts=4
 
 PortSystem      1.0
+PortGroup       obsolete 1.0
 
 name            eric4
+replaced_by     py37-eric-ide
 version         4.5.13
-revision        1
+revision        2
 categories      devel
-platforms       darwin
-maintainers     nomaintainer
 license         GPL-3
 
-description     Eric is a full featured Python and Ruby editor and IDE, written in python
-
-long_description \
-    Eric is a full featured Python and Ruby editor and IDE, written in python. \
-    It is based on the cross platform Qt gui toolkit, integrating the highly  \
-    flexible Scintilla editor control. It is designed to be usable as everdays' \
-    quick and dirty editor as well as being usable as a professional project \
-    management tool integrating many advanced features Python offers the \
-    professional coder.
-
-homepage        http://eric-ide.python-projects.org/index.html
-master_sites    sourceforge:project/eric-ide/${name}/stable/${version}/
-
-checksums       rmd160  0b01bb4c46c4ac959b5f45f037caeece624c504d \
-                sha256  7032ff5758455b89fe733b41956e8ea60e215c4381603e897116cd15bb29da65
-
-depends_lib     port:python27 \
-                port:py27-pyqt4 \
-                port:py27-qscintilla-qt4 \
-                port:py27-pysvn \
-                port:py27-rope \
-                port:py27-pylint \
-                port:py27-cx_Freeze \
-                port:py27-enchant
-
-patchfiles      patch-install.py.diff
-
-post-patch {
-    reinplace "s|@APPLICATIONS_DIR@|${destroot}${applications_dir}|g" ${worksrcpath}/install.py
-}
-
-use_configure   no
-
-build {
-    # Building and installing are synonymous
-}
-
-destroot {
-    system -W ${worksrcpath} "${prefix}/bin/python2.7 install.py -b '${prefix}/bin' -i '${destroot}'"
-}
-
-livecheck.type  regex
-livecheck.url   http://eric-ide.python-projects.org/eric-news.html
-livecheck.regex "eric4 (\\d+\\.\\d+\\.\\d+) has been released"
+# remove after April 26, 2020