Remove traces of third_party/gyp

gyp is no longer used in/by crashpad (since crrev.com/c/3034984) and
isn't referenced in DEPS.

Bug: 374516744
Change-Id: I06bf6d05457a9f0a084db8ec2da75b6e07780b41
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/6168877
Commit-Queue: Peter Boström <[email protected]>
Reviewed-by: Mark Mentovai <[email protected]>

Author: pbos

.gitattributes

@@ -23,8 +23,6 @@
 *.gn text eol=lf
 *.gni text eol=lf
 *.go text eol=lf
-*.gyp text eol=lf
-*.gypi text eol=lf
 *.h text eol=lf
 *.m text eol=lf
 *.md text eol=lf

.gitignore

@@ -36,7 +36,6 @@
 /third_party/fuchsia/qemu
 /third_party/fuchsia/sdk
 /third_party/googletest/googletest
-/third_party/gyp/gyp
 /third_party/libfuzzer
 /third_party/linux/.cipd
 /third_party/linux/clang