bazel: remove duplicated env in repository_rule (#4969)
bazel: remove duplicated env in repository_rule (#4969)

Just remove duplicate env CXX in cc_autoconf

Risk Level: Low
Testing: n/a

Signed-off-by: detailyang <076aa6b9e5c991ab740278a55c712360b39f4bb6@gmail.com>
lyft/envoy,jrajahalme/envoy,lyft/envoy,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,lizan/envoy,istio/envoy,lizan/envoy,jrajahalme/envoy,envoyproxy/envoy,istio/envoy,jrajahalme/envoy,dnoe/envoy,eklitzke/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,eklitzke/envoy,eklitzke/envoy,eklitzke/envoy,dnoe/envoy,dnoe/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,envoyproxy/envoy-wasm,dnoe/envoy,jrajahalme/envoy,istio/envoy,lyft/envoy,eklitzke/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,lizan/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,lizan/envoy,istio/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,lizan/envoy,lizan/envoy,envoyproxy/envoy,istio/envoy,lyft/envoy,envoyproxy/envoy,istio/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,dnoe/envoy,jrajahalme/envoy