Makefile cleanup

Removed unused function rm-dupls() from common.mk
    Removed code from patch-ld-so.py which is not needed for AMD codebase.

AMD-Internal: [CPUPL-1539]
Change-Id: If1812d5aa87c1e3a9d0c4706d571223d56f2fc20

common.mk

@@ -212,12 +212,6 @@ get-sandbox-cxxtext-for = "('$(1)' CXXFLAGS for sandboxes)"
 files-that-contain      = $(strip $(foreach f, $(1), $(if $(findstring $(2),$(f)),$(f),)))
 files-that-dont-contain = $(strip $(foreach f, $(1), $(if $(findstring $(2),$(f)),,$(f))))
 
-# Define a function that removes duplicate words from a list.
-# NOTE: This function was obtained via [1]; thanks bobbogo for this
-# concise definition.
-# [1] https://stackoverflow.com/questions/16144115/makefile-remove-duplicate-words-without-sorting
-rm-dupls = $(if $1,$(firstword $1) $(call rm-dupls,$(filter-out $(firstword $1),$1)))
-
 
 #
 # --- Include makefile configuration file --------------------------------------

travis/patch-ld-so.py

@@ -1,16 +1,3 @@
 #!/usr/bin/env python
 
-#
-# Patch ld.so to disable runtime CPUID detection
-# Taken from https://stackoverflow.com/a/44483482
-#
-
-import re
-import sys
-
-infile, outfile = sys.argv[1:]
-d = open(infile, 'rb').read()
-# Match CPUID(eax=0), "xor eax,eax" followed closely by "cpuid"
-o = re.sub(b'(\x31\xc0.{0,32})\x0f\xa2', b'\\1\x66\x90', d)
-#assert d != o
-open(outfile, 'wb').write(o)
+# Stub file in AMD repository as it is not needed