Revert "[build] Port "Add patched eu-strip in third_party""

This is no longer necessary after
https://chromium-review.googlesource.com/c/chromium/src/+/1427781

This reverts commit 571076ec.

Change-Id: Id754864022171fd3da8f7274b5d3b526603337ce
Reviewed-on: https://chromium-review.googlesource.com/c/1446136
Commit-Queue: Michael Spang <spang@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59254}

.gitignore

@@ -59,7 +59,6 @@
 /third_party/*
 !/third_party/antlr4
 !/third_party/binutils
-!/third_party/eu-strip
 !/third_party/inspector_protocol
 !/third_party/colorama
 /third_party/colorama/src

third_party/eu-strip/README.v8

-Name: eu-strip
-URL: https://sourceware.org/elfutils/
-Version: 0.158
-Security Critical: no
-License: LGPL 3
-License File: NOT_SHIPPED
-
-Description:
-
-Patched eu-strip from elfutils.
-
-Build instructions (on Trusty; note that this will build the
-Ubuntu-patched version of elfutils):
-$ mkdir elfutils
-$ cd elfutils
-$ apt-get source elfutils
-$ cd elfutils-0.158
-[ Edit libelf/elf_end.c and remove the free() on line 164. ]
-$ ./configure
-$ make
-$ gcc -std=gnu99 -Wall -Wshadow -Wunused -Wextra -fgnu89-inline
-  -Wformat=2 -Werror -g -O2 -Wl,-rpath-link,libelf:libdw -o eu-strip
-  src/strip.o libebl/libebl.a libelf/libelf.a lib/libeu.a -ldl
-$ eu-strip ./eu-strip  # Keep the binary small, please.