(maint) Remove dead ppc64 code

It was possible to build el-7-ppc64 at one point, see
puppetlabs/puppet-agent@bc31f0733d, but that platform was deleted in
puppetlabs/puppet-agent@a1a06ba3f4 and puppetlabs/ci-job-configs@1d81f64.

Note ppc64 is a different platform than ppc64le. We still support el-8-ppc64le.

configs/components/_base-ruby-augeas.rb

@@ -57,31 +57,6 @@
   ruby = File.join(ruby_bindir, 'ruby')
 end
 
-# This is a disturbing workaround needed for s390x based systems, that
-# for some reason isn't encountered with our other architecture cross
-# builds. When trying to build the augeas test cases for extconf.rb,
-# the process fails with "/opt/pl-build-tools/bin/s390x-linux-gnu-gcc:
-# error while loading shared libraries: /opt/puppetlabs/puppet/lib/libstdc++.so.6:
-# ELF file data encoding not little-endian". It will also complain in
-# the same way about libgcc. If however we temporarily move these
-# libraries out of the way, extconf.rb and the cross-compile work
-# properly. This needs to be fixed, but I've spent over a week analyzing
-# every possible angle that could cause this, from rbconfig settings to
-# strace logs, and we need to move forward on this platform.
-#
-# This seems to apply directly to Linux on ppc64 - I've gotten successful builds
-# with this change.
-# FIXME: Scott Garman Jun 2016
-if platform.architecture == "ppc64"
-  pkg.configure do
-    [
-      "mkdir #{settings[:libdir]}/hide",
-      "mv #{settings[:libdir]}/libstdc* #{settings[:libdir]}/hide/",
-      "mv #{settings[:libdir]}/libgcc* #{settings[:libdir]}/hide/"
-    ]
-  end
-end
-
 pkg.build do
   build_commands = []
   if ruby_version =~ /^3/
@@ -115,16 +90,6 @@
   end
 end
 
-# Undo the gross hack from the configure step
-if platform.architecture == "ppc64"
-  pkg.install do
-    [
-      "mv #{settings[:libdir]}/hide/* #{settings[:libdir]}/",
-      "rmdir #{settings[:libdir]}/hide/"
-    ]
-  end
-end
-
 # Clean after install in case we are building for multiple rubies.
 pkg.install do
   "#{platform[:make]} -e clean"

configs/components/ruby-shadow.rb

@@ -18,29 +18,6 @@
     ruby = File.join(settings[:ruby_bindir], 'ruby')
   end
 
-  # This is a disturbing workaround needed for s390x based systems, that
-  # for some reason isn't encountered with our other architecture cross
-  # builds. When trying to build the libshadow test cases for extconf.rb,
-  # the process fails with "/opt/pl-build-tools/bin/s390x-linux-gnu-gcc:
-  # error while loading shared libraries: /opt/puppetlabs/puppet/lib/libstdc++.so.6:
-  # ELF file data encoding not little-endian". It will also complain in
-  # the same way about libgcc. If however we temporarily move these
-  # libraries out of the way, extconf.rb and the cross-compile work
-  # properly. This needs to be fixed, but I've spent over a week analyzing
-  # every possible angle that could cause this, from rbconfig settings to
-  # strace logs, and we need to move forward on this platform.
-  # FIXME: Scott Garman Jun 2016
-  # Added to ppc64
-  if platform.architecture == "ppc64"
-    pkg.configure do
-      [
-        "mkdir #{settings[:libdir]}/hide",
-        "mv #{settings[:libdir]}/libstdc* #{settings[:libdir]}/hide/",
-        "mv #{settings[:libdir]}/libgcc* #{settings[:libdir]}/hide/"
-      ]
-    end
-  end
-
   matchdata = platform.settings[:ruby_version].match /(\d+)\.(\d+)\.\d+/
   ruby_major_version = matchdata[1].to_i
   if ruby_major_version >= 3
@@ -59,14 +36,4 @@
   pkg.install do
     ["#{platform[:make]} -e -j$(shell expr $(shell #{platform[:num_cores]}) + 1) DESTDIR=/ install"]
   end
-
-  # Undo the gross hack from the configure step
-  if platform.architecture == "ppc64"
-    pkg.install do
-      [
-        "mv #{settings[:libdir]}/hide/* #{settings[:libdir]}/",
-        "rmdir #{settings[:libdir]}/hide/"
-      ]
-    end
-  end
 end

configs/projects/_shared-agent-settings.rb

@@ -83,7 +83,6 @@
 proj.setting(:ruby_vendordir, File.join(proj.libdir, "ruby", "vendor_ruby"))
 
 # Cross-compiled Linux platforms
-platform_triple = "ppc64-redhat-linux" if platform.architecture == "ppc64"
 platform_triple = "ppc64le-redhat-linux" if platform.architecture == "ppc64le"
 platform_triple = "powerpc64le-suse-linux" if platform.architecture == "ppc64le" && platform.name =~ /^sles-/
 platform_triple = "powerpc64le-linux-gnu" if platform.architecture == "ppc64el"