Remove patch that is no longer required in rust 1.7.0

Signed-off-by: Derek Straka <derek@asterius.io>

recipes-devtools/rust/files/rust/0001-platform.mk-avoid-choking-on-i586.patch

@@ -1,27 +0,0 @@
-From af2eaed835d3b717552ea83e75f4c5e86e614979 Mon Sep 17 00:00:00 2001
-From: Cody P Schafer <dev@codyps.com>
-Date: Sat, 15 Nov 2014 20:12:48 -0500
-Subject: [PATCH 1/9] platform.mk: avoid choking on i586
-
----
- mk/platform.mk | 4 +++-
- 1 file changed, 3 insertions(+), 1 deletion(-)
-
-diff --git a/mk/platform.mk b/mk/platform.mk
-index 856a22d..0c90632 100644
---- a/mk/platform.mk
-+++ b/mk/platform.mk
-@@ -14,7 +14,9 @@
- # would create a variable HOST_i686-darwin-macos with the value
- # i386.
- define DEF_HOST_VAR
--  HOST_$(1) = $(subst i686,i386,$(word 1,$(subst -, ,$(1))))
-+  HOST_$(1) = $(subst i686,i386,\
-+    $(subst i586,i386,\
-+    $(word 1,$(subst -, ,$(1)))))
- endef
- $(foreach t,$(CFG_TARGET),$(eval $(call DEF_HOST_VAR,$(t))))
- $(foreach t,$(CFG_TARGET),$(info cfg: host for $(t) is $(HOST_$(t))))
--- 
-2.4.10
-

recipes-devtools/rust/rust-source.bb

@@ -13,7 +13,6 @@ SRC_URI[rust.sha256sum] = "641037af7b7b6cad0b231cc20671f8a314fbf2f40fc0901d0b877
 LIC_FILES_CHKSUM = "file://COPYRIGHT;md5=eb87dba71cb424233bcce88db3ae2f1a"
 
 SRC_URI_append = "\
-        file://rust/0001-platform.mk-avoid-choking-on-i586.patch \
         file://rust/0002-Target-add-default-target.json-path-libdir-rust-targ.patch \
         file://rust/0003-mk-for-stage0-use-RUSTFLAGS-to-override-target-libs-.patch \
         file://rust/0004-mk-add-missing-CFG_LIBDIR_RELATIVE.patch \