libgit2: remove obsolete items from common inc

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

recipes-deps/libgit2/libgit2.inc

@@ -16,17 +16,4 @@ EXTRA_OECMAKE = "\
 	-DBUILD_EXAMPLES=OFF \
 "
 
-CFLAGS_append .= " -fPIC"
-
-# Prior to poky commit 60d504b431fa7cdc6ded141def7ae18edb1834e5,
-# the cmake class did not define CMAKE_AR in the generated toolchain
-# file.  This is needed to support building a static library.
-# See https://github.com/jmesmon/meta-rust/issues/1
-OECMAKE_AR ?= "${AR}"
-cmake_do_generate_toolchain_file_append() {
-    cat >> ${WORKDIR}/toolchain.cmake <<EOF
-set( CMAKE_AR ${OECMAKE_AR} CACHE FILEPATH "Archiver" )
-EOF
-}
-
 BBCLASSEXTEND = "native"