ovmf: remove patch merged upstream

See here:
https://github.com/tianocore/edk2/pull/1513/files

The change was thus applied twice to the same file.

(From OE-Core rev: af90f9681bae3defe841ddcf80755960792faa88)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/ovmf/ovmf/0004-Strip-build-paths.patch

@@ -1,32 +0,0 @@
-From b7cfe97895e0586d14403ba98e62a0cd9373da96 Mon Sep 17 00:00:00 2001
-From: Alexander Kanavin <alex.kanavin@gmail.com>
-Date: Mon, 14 Jun 2021 19:55:08 +0200
-Subject: [PATCH 4/6] Strip build paths
-
-Pass --zero to GenFw in release builds so that the sections that link back to
-the intermediate binaries (containing build paths) are removed.
-
-Upstream-Status: Pending (discussion at https://bugzilla.tianocore.org/show_bug.cgi?id=3256)
-Signed-off-by: Ross Burton <ross.burton@arm.com>
-
-Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
----
- OvmfPkg/OvmfPkgIa32.dsc | 2 ++
- 1 file changed, 2 insertions(+)
-
-diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
-index 33fbd76790..06c6d5ce60 100644
---- a/OvmfPkg/OvmfPkgIa32.dsc
-+++ b/OvmfPkg/OvmfPkgIa32.dsc
-@@ -91,6 +91,8 @@
- 
- !include NetworkPkg/NetworkBuildOptions.dsc.inc
- 
-+  RELEASE_*_*_GENFW_FLAGS = --zero
-+
- [BuildOptions.common.EDKII.DXE_RUNTIME_DRIVER]
-   GCC:*_*_*_DLINK_FLAGS = -z common-page-size=0x1000
-   XCODE:*_*_*_DLINK_FLAGS = -seg1addr 0x1000 -segalign 0x1000
--- 
-2.32.0
-

meta/recipes-core/ovmf/ovmf_git.bb

@@ -19,7 +19,6 @@ SRC_URI = "gitsm://github.com/tianocore/edk2.git;branch=master;protocol=https \
            file://0001-ovmf-update-path-to-native-BaseTools.patch \
            file://0002-BaseTools-makefile-adjust-to-build-in-under-bitbake.patch \
            file://0003-ovmf-Update-to-latest.patch \
-           file://0004-Strip-build-paths.patch \
            file://0005-debug-prefix-map.patch \
            file://0006-reproducible.patch \
            file://0001-Fix-VLA-parameter-warning.patch \