payloads/tianocore: Don't declare tools directory twice

EDK_TOOLS_PATH is set on lines 85 and 137. Remove the instance
on 85. edk2 still builds correctly.

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: I0c837f14693941afec194b140c93d786ea784e53
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63180
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/payloads/external/tianocore/Makefile b/payloads/external/tianocore/Makefile
index 0908606..405af72 100644
--- a/payloads/external/tianocore/Makefile
+++ b/payloads/external/tianocore/Makefile
@@ -82,8 +82,6 @@
 
 bootloader = $(word 8,$(subst /, ,$(BUILD_STR)))
 
-export EDK_TOOLS_PATH=$(project_dir)/BaseTools
-
 all: clean build
 
 $(project_dir):